Finding the Fourth Proportional to 131,569.32, 181,565.28 and 71,139.54

Step by Step Solution

1. Step 1: Write the proportion equation
   131,569.32 : 181,565.28 = 71,139.54 : x
2. Step 2: Convert to fraction form
   131,569.32/181,565.28 = 71,139.54/x
3. Step 3: Cross multiply
   131,569.32x = 181,565.28 × 71,139.54
4. Step 4: Simplify right side
   131,569.32x = 12,916,470,499.17
5. Step 5: Solve for x
   x = 12,916,470,499.17/131,569.32
6. Step 6: Final answer
   x = 98,172.36