Finding the Fourth Proportional to 131,788.90, 181,868.79 and 71,359.57

Step by Step Solution

1. Step 1: Write the proportion equation
   131,788.90 : 181,868.79 = 71,359.57 : x
2. Step 2: Convert to fraction form
   131,788.90/181,868.79 = 71,359.57/x
3. Step 3: Cross multiply
   131,788.90x = 181,868.79 × 71,359.57
4. Step 4: Simplify right side
   131,788.90x = 12,978,078,294.02
5. Step 5: Solve for x
   x = 12,978,078,294.02/131,788.90
6. Step 6: Final answer
   x = 98,476.27