Finding the Fourth Proportional to 131,569.37, 181,565.72 and 71,140

Step by Step Solution

1. Step 1: Write the proportion equation
   131,569.37 : 181,565.72 = 71,140 : x
2. Step 2: Convert to fraction form
   131,569.37/181,565.72 = 71,140/x
3. Step 3: Cross multiply
   131,569.37x = 181,565.72 × 71,140
4. Step 4: Simplify right side
   131,569.37x = 12,916,585,320.80
5. Step 5: Solve for x
   x = 12,916,585,320.80/131,569.37
6. Step 6: Final answer
   x = 98,173.19