Finding the Fourth Proportional to 1,080.28, 1,490.76 and 614.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.28 : 1,490.76 = 614.50 : x
2. Step 2: Convert to fraction form
   1,080.28/1,490.76 = 614.50/x
3. Step 3: Cross multiply
   1,080.28x = 1,490.76 × 614.50
4. Step 4: Simplify right side
   1,080.28x = 916,072.02
5. Step 5: Solve for x
   x = 916,072.02/1,080.28
6. Step 6: Final answer
   x = 847.99