Finding the Fourth Proportional to 1,081.24, 1,492.12 and 615.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.24 : 1,492.12 = 615.52 : x
2. Step 2: Convert to fraction form
   1,081.24/1,492.12 = 615.52/x
3. Step 3: Cross multiply
   1,081.24x = 1,492.12 × 615.52
4. Step 4: Simplify right side
   1,081.24x = 918,429.70
5. Step 5: Solve for x
   x = 918,429.70/1,081.24
6. Step 6: Final answer
   x = 849.42