Finding the Fourth Proportional to 1,081.42, 1,492.32 and 615.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.42 : 1,492.32 = 615.58 : x
2. Step 2: Convert to fraction form
   1,081.42/1,492.32 = 615.58/x
3. Step 3: Cross multiply
   1,081.42x = 1,492.32 × 615.58
4. Step 4: Simplify right side
   1,081.42x = 918,642.35
5. Step 5: Solve for x
   x = 918,642.35/1,081.42
6. Step 6: Final answer
   x = 849.48