Check exactly how much shorty has left.
Raise exactly half that amount.
Hope the other 2 call then he ships.
Reship.
Seemples.
Whatever you do don't raise slightly more than half of shorty's stack or you'll end up having to flat and get stuck in a 4 way pot where you're getting the lot in no matter what and only getting called by better.
That would have been what I would have done if I was any good at this game *lol*. As it is I'm a fish so I shoved and they all folded. Thought there must be a way of getting more value than that, oh well. Live and learn and all that.
Cheers For that though Mr Pie :-)