Finding the Fourth Proportional to 129,155.32, 178,234.17 and 71,792.86

Step by Step Solution

1. Step 1: Write the proportion equation
   129,155.32 : 178,234.17 = 71,792.86 : x
2. Step 2: Convert to fraction form
   129,155.32/178,234.17 = 71,792.86/x
3. Step 3: Cross multiply
   129,155.32x = 178,234.17 × 71,792.86
4. Step 4: Simplify right side
   129,155.32x = 12,795,940,814.03
5. Step 5: Solve for x
   x = 12,795,940,814.03/129,155.32
6. Step 6: Final answer
   x = 99,074.05