Finding the Fourth Proportional to 72,146.59, 99,562.08 and 40,315.53

Step by Step Solution

1. Step 1: Write the proportion equation
   72,146.59 : 99,562.08 = 40,315.53 : x
2. Step 2: Convert to fraction form
   72,146.59/99,562.08 = 40,315.53/x
3. Step 3: Cross multiply
   72,146.59x = 99,562.08 × 40,315.53
4. Step 4: Simplify right side
   72,146.59x = 4,013,898,023.10
5. Step 5: Solve for x
   x = 4,013,898,023.10/72,146.59
6. Step 6: Final answer
   x = 55,635.31