Finding the Fourth Proportional to 69,061.10, 103,445.85 and 57,397.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69,061.10 : 103,445.85 = 57,397.10 : x
2. Step 2: Convert to fraction form
   69,061.10/103,445.85 = 57,397.10/x
3. Step 3: Cross multiply
   69,061.10x = 103,445.85 × 57,397.10
4. Step 4: Simplify right side
   69,061.10x = 5,937,491,797.04
5. Step 5: Solve for x
   x = 5,937,491,797.04/69,061.10
6. Step 6: Final answer
   x = 85,974.47