Finding the Fourth Proportional to 131,260.50, 181,139.49 and 71,644.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,260.50 : 181,139.49 = 71,644.50 : x
2. Step 2: Convert to fraction form
   131,260.50/181,139.49 = 71,644.50/x
3. Step 3: Cross multiply
   131,260.50x = 181,139.49 × 71,644.50
4. Step 4: Simplify right side
   131,260.50x = 12,977,648,191.31
5. Step 5: Solve for x
   x = 12,977,648,191.31/131,260.50
6. Step 6: Final answer
   x = 98,869.41