Finding the Fourth Proportional to 72,146.62, 99,562.18 and 40,315.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,146.62 : 99,562.18 = 40,315.52 : x
2. Step 2: Convert to fraction form
   72,146.62/99,562.18 = 40,315.52/x
3. Step 3: Cross multiply
   72,146.62x = 99,562.18 × 40,315.52
4. Step 4: Simplify right side
   72,146.62x = 4,013,901,002.72
5. Step 5: Solve for x
   x = 4,013,901,002.72/72,146.62
6. Step 6: Final answer
   x = 55,635.33