Finding the Fourth Proportional to 72,419,472.71, 99,940,766.43 and 39,381,654.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,419,472.71 : 99,940,766.43 = 39,381,654.09 : x
2. Step 2: Convert to fraction form
   72,419,472.71/99,940,766.43 = 39,381,654.09/x
3. Step 3: Cross multiply
   72,419,472.71x = 99,940,766.43 × 39,381,654.09
4. Step 4: Simplify right side
   72,419,472.71x = 3,935,832,693,035,745
5. Step 5: Solve for x
   x = 3,935,832,693,035,745/72,419,472.71
6. Step 6: Final answer
   x = 54,347,712.65