Finding the Fourth Proportional to 57,640.88, 86,414.37 and 38,685.06

Step by Step Solution

1. Step 1: Write the proportion equation
   57,640.88 : 86,414.37 = 38,685.06 : x
2. Step 2: Convert to fraction form
   57,640.88/86,414.37 = 38,685.06/x
3. Step 3: Cross multiply
   57,640.88x = 86,414.37 × 38,685.06
4. Step 4: Simplify right side
   57,640.88x = 3,342,945,088.31
5. Step 5: Solve for x
   x = 3,342,945,088.31/57,640.88
6. Step 6: Final answer
   x = 57,996.09