Finding the Fourth Proportional to 2,617.57, 3,925.24 and 1,057.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.57 : 3,925.24 = 1,057.15 : x
2. Step 2: Convert to fraction form
   2,617.57/3,925.24 = 1,057.15/x
3. Step 3: Cross multiply
   2,617.57x = 3,925.24 × 1,057.15
4. Step 4: Simplify right side
   2,617.57x = 4,149,567.47
5. Step 5: Solve for x
   x = 4,149,567.47/2,617.57
6. Step 6: Final answer
   x = 1,585.27