Heavyweight king AJ is still looking for an opponent for his April 13 show at Wembley after failing to sign a deal with WBC champ Deontay Wilder.
It is understood Hearn has offered Fury 40 per cent of a potential £50million purse — meaning he would get £20m, while Joshua would trouser £30m.
Hearn told the Gypsy King: “Fury, you can have the fight on the 13th, you know the terms.
“I am not saying if I have made an offer — make of that what you will — but Fury knows the money he’d make.”
A fight between Watford’s Joshua, the WBA, IBF and WBO champ, and Mancunian Fury could generate £100m.
The pair would split £50m of that, 60-40 in AJ’s favour.
Fury has always said he will not fight Joshua for anything less than a 50-50 split.
Fury told BT Sport: “Hopefully I get a fight with Wilder in America or England.
“I’d like a homecoming fight in April, maybe in Manchester or somewhere in the UK and then I’d like to fight Wilder again.”
If Joshua cannot agree terms with Fury, Wilder or third-choice Dillian Whyte, the Wembley date could be scrapped.
And the champ would then face an underwhelming June fight against American unknown Jarrell Miller.
Hearn added: “We are making improved offers to a number of parties.
“It’s so frustrating when people think Joshua does not want to fight Wilder, Fury or Whyte.
“Of course he does but they say: ‘I will fight Joshua’ and want obscene money. They are not even entertaining the conversation.
“Joshua wants Wilder head and shoulders above everyone.
“I believe Dillian deserves a shot and I represent him, too.
“I am going to make Dillian an improved offer. I didn’t think the first one was ridiculous but we will make a second.”