Finding the Fourth Proportional to 144,075.71, 215,965.77 and 55,305.31

Step by Step Solution

1. Step 1: Write the proportion equation
   144,075.71 : 215,965.77 = 55,305.31 : x
2. Step 2: Convert to fraction form
   144,075.71/215,965.77 = 55,305.31/x
3. Step 3: Cross multiply
   144,075.71x = 215,965.77 × 55,305.31
4. Step 4: Simplify right side
   144,075.71x = 11,944,053,582.71
5. Step 5: Solve for x
   x = 11,944,053,582.71/144,075.71
6. Step 6: Final answer
   x = 82,901.23