Finding the Fourth Proportional to 131,105.50, 180,925.60 and 71,489.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,105.50 : 180,925.60 = 71,489.50 : x
2. Step 2: Convert to fraction form
   131,105.50/180,925.60 = 71,489.50/x
3. Step 3: Cross multiply
   131,105.50x = 180,925.60 × 71,489.50
4. Step 4: Simplify right side
   131,105.50x = 12,934,280,681.20
5. Step 5: Solve for x
   x = 12,934,280,681.20/131,105.50
6. Step 6: Final answer
   x = 98,655.52