Finding the Fourth Proportional to 131,266.50, 181,147.78 and 71,650.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,266.50 : 181,147.78 = 71,650.50 : x
2. Step 2: Convert to fraction form
   131,266.50/181,147.78 = 71,650.50/x
3. Step 3: Cross multiply
   131,266.50x = 181,147.78 × 71,650.50
4. Step 4: Simplify right side
   131,266.50x = 12,979,329,010.89
5. Step 5: Solve for x
   x = 12,979,329,010.89/131,266.50
6. Step 6: Final answer
   x = 98,877.70