Finding the Fourth Proportional to 1,112.74, 1,535.50 and 615.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.74 : 1,535.50 = 615.34 : x
2. Step 2: Convert to fraction form
   1,112.74/1,535.50 = 615.34/x
3. Step 3: Cross multiply
   1,112.74x = 1,535.50 × 615.34
4. Step 4: Simplify right side
   1,112.74x = 944,854.57
5. Step 5: Solve for x
   x = 944,854.57/1,112.74
6. Step 6: Final answer
   x = 849.12