Finding the Fourth Proportional to 1,112.73, 1,535.47 and 615.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.73 : 1,535.47 = 615.37 : x
2. Step 2: Convert to fraction form
   1,112.73/1,535.47 = 615.37/x
3. Step 3: Cross multiply
   1,112.73x = 1,535.47 × 615.37
4. Step 4: Simplify right side
   1,112.73x = 944,874.50
5. Step 5: Solve for x
   x = 944,874.50/1,112.73
6. Step 6: Final answer
   x = 849.15