Finding the Fourth Proportional to 131,789.90, 181,870.17 and 71,360.57

Step by Step Solution

1. Step 1: Write the proportion equation
   131,789.90 : 181,870.17 = 71,360.57 : x
2. Step 2: Convert to fraction form
   131,789.90/181,870.17 = 71,360.57/x
3. Step 3: Cross multiply
   131,789.90x = 181,870.17 × 71,360.57
4. Step 4: Simplify right side
   131,789.90x = 12,978,358,997.20
5. Step 5: Solve for x
   x = 12,978,358,997.20/131,789.90
6. Step 6: Final answer
   x = 98,477.65