Finding the Fourth Proportional to 1,080.57, 1,491.18 and 614.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.57 : 1,491.18 = 614.82 : x
2. Step 2: Convert to fraction form
   1,080.57/1,491.18 = 614.82/x
3. Step 3: Cross multiply
   1,080.57x = 1,491.18 × 614.82
4. Step 4: Simplify right side
   1,080.57x = 916,807.29
5. Step 5: Solve for x
   x = 916,807.29/1,080.57
6. Step 6: Final answer
   x = 848.45