You can solve this using proportions. There are two triangles in this diagram, which appear to be similar.
67.2 - 32 67.2
------------ = --------- results in 67.2x = 81.9(67.2-32)
x 81.9 = 2882.88
2882.88
Then x = ------------- = 42.9 (answer, units of measurement are "meters")
67.2
