Finding the Fourth Proportional to 129,083.31, 178,151.68 and 72,494.69

Step by Step Solution

1. Step 1: Write the proportion equation
   129,083.31 : 178,151.68 = 72,494.69 : x
2. Step 2: Convert to fraction form
   129,083.31/178,151.68 = 72,494.69/x
3. Step 3: Cross multiply
   129,083.31x = 178,151.68 × 72,494.69
4. Step 4: Simplify right side
   129,083.31x = 12,915,050,187.96
5. Step 5: Solve for x
   x = 12,915,050,187.96/129,083.31
6. Step 6: Final answer
   x = 100,052.05