Finding the Fourth Proportional to 1,080.94, 1,491.52 and 615.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.94 : 1,491.52 = 615.10 : x
2. Step 2: Convert to fraction form
   1,080.94/1,491.52 = 615.10/x
3. Step 3: Cross multiply
   1,080.94x = 1,491.52 × 615.10
4. Step 4: Simplify right side
   1,080.94x = 917,433.95
5. Step 5: Solve for x
   x = 917,433.95/1,080.94
6. Step 6: Final answer
   x = 848.74