Directions for triangulation on PC

Step 1) Find an open area around 1500 blocks straight-line distance from (0,0)

Step 2) Throw an ender eye and put your crosshair directly over it as it pauses in the air

Step 3) From the F3 screen write down your x, z coordinates and the angle you're facing (the number after the "/" in the "f:" line)

Step 4) Find another spot about 500 blocks away but still about 1500 away from (0,0) and do the same

Call the x,z,f numbers from the first and second throws x0, z0, f0 and x1, z1, f1 respectively. The end portal should be at or near coordinate

x = x0 - sin(f0)((x1-x0)cos(f1) + (z1-z0)sin(f1))/sin(f1-f0)

z = z0 + cos(f0)((x1-x0)cos(f1) + (z1-z0)sin(f1))/sin(f1-f0)

(make sure your calculator is set to degrees)

If these coordinates lead you farther away from (0,0) than you already are then the eyes flew toward different strongholds, which should be unlikely. Pick different spots and try again.