Finding the Fourth Proportional to 1,080.24, 1,490.72 and 614.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.24 : 1,490.72 = 614.50 : x
2. Step 2: Convert to fraction form
   1,080.24/1,490.72 = 614.50/x
3. Step 3: Cross multiply
   1,080.24x = 1,490.72 × 614.50
4. Step 4: Simplify right side
   1,080.24x = 916,047.44
5. Step 5: Solve for x
   x = 916,047.44/1,080.24
6. Step 6: Final answer
   x = 848.00