Finding the Fourth Proportional to 1,112.96, 1,535.84 and 615.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.96 : 1,535.84 = 615.59 : x
2. Step 2: Convert to fraction form
   1,112.96/1,535.84 = 615.59/x
3. Step 3: Cross multiply
   1,112.96x = 1,535.84 × 615.59
4. Step 4: Simplify right side
   1,112.96x = 945,454.78
5. Step 5: Solve for x
   x = 945,454.78/1,112.96
6. Step 6: Final answer
   x = 849.50