Finding the Fourth Proportional to 72,002.40, 99,358.65 and 39,737.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72,002.40 : 99,358.65 = 39,737.31 : x
2. Step 2: Convert to fraction form
   72,002.40/99,358.65 = 39,737.31/x
3. Step 3: Cross multiply
   72,002.40x = 99,358.65 × 39,737.31
4. Step 4: Simplify right side
   72,002.40x = 3,948,245,476.23
5. Step 5: Solve for x
   x = 3,948,245,476.23/72,002.40
6. Step 6: Final answer
   x = 54,834.91