Finding the Fourth Proportional to 1,112.57, 1,535.37 and 615.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.57 : 1,535.37 = 615.24 : x
2. Step 2: Convert to fraction form
   1,112.57/1,535.37 = 615.24/x
3. Step 3: Cross multiply
   1,112.57x = 1,535.37 × 615.24
4. Step 4: Simplify right side
   1,112.57x = 944,624.78
5. Step 5: Solve for x
   x = 944,624.78/1,112.57
6. Step 6: Final answer
   x = 849.05