Finding the Fourth Proportional to 129,320.92, 178,462.83 and 72,732.25

Step by Step Solution

1. Step 1: Write the proportion equation
   129,320.92 : 178,462.83 = 72,732.25 : x
2. Step 2: Convert to fraction form
   129,320.92/178,462.83 = 72,732.25/x
3. Step 3: Cross multiply
   129,320.92x = 178,462.83 × 72,732.25
4. Step 4: Simplify right side
   129,320.92x = 12,980,003,167.27
5. Step 5: Solve for x
   x = 12,980,003,167.27/129,320.92
6. Step 6: Final answer
   x = 100,370.48