Finding the Fourth Proportional to 1,081.25, 1,492.13 and 615.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.25 : 1,492.13 = 615.59 : x
2. Step 2: Convert to fraction form
   1,081.25/1,492.13 = 615.59/x
3. Step 3: Cross multiply
   1,081.25x = 1,492.13 × 615.59
4. Step 4: Simplify right side
   1,081.25x = 918,540.31
5. Step 5: Solve for x
   x = 918,540.31/1,081.25
6. Step 6: Final answer
   x = 849.52