Okay, so I whipped out PokerStove.
(does it always take this long to run, or does 3-way run a long time, or is the the wide ranges that make it take a while? oops, I see I did "all" instead of Monte Carlo, that's likely the culprit)

Player 1 is on a pretty loose range, any A, any pair, any paint 8 & up and any K or Q suited 5 & up. (40.3%)

Then I put player 2 on my hand, AJo

Then I put player 3 (re-raising) on pairs down to JJ, AK, AQ and AJs (4.5%)

What is the difference between "equity" and "win%" in pokerstove?

So roughly, I have a 20% chance, ss has 25% and big stack has 50%

when hero folds:
ss losing .2922* (2/3 = .1948
ss winning .2161/3 = .072

I'm stuck on the hero calls conditions. When someone beats one, and loses to another, what from the above 'win%' do I use? Missing something here.

Thanks for the help. Still tinkering with this.