Finding the Fourth Proportional to 131,789.38, 181,869.43 and 71,360.05

Step by Step Solution

1. Step 1: Write the proportion equation
   131,789.38 : 181,869.43 = 71,360.05 : x
2. Step 2: Convert to fraction form
   131,789.38/181,869.43 = 71,360.05/x
3. Step 3: Cross multiply
   131,789.38x = 181,869.43 × 71,360.05
4. Step 4: Simplify right side
   131,789.38x = 12,978,211,618.27
5. Step 5: Solve for x
   x = 12,978,211,618.27/131,789.38
6. Step 6: Final answer
   x = 98,476.92