Wolfram Alpha and Minecraft triangulation.

Running a Wolfram Alpha prompt on "intersection of line through (-250,-1556) and through (-241,-1546) and line through (-32,-198) and through (-22,-198)" will solve the location of the stronghold in your particular world.

intersection of line through (StartX0,StartZ0) and through (EndX0,EndZ0) and line through (StartX1,StartZ1) and through (EndX1,EndZ1)

I had to tell the wolfram people to fix it. Somehow it neglected to actually solve it. But, now it's golden.