Finding the Fourth Proportional to 1,080.06, 1,490.56 and 614.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.06 : 1,490.56 = 614.31 : x
2. Step 2: Convert to fraction form
   1,080.06/1,490.56 = 614.31/x
3. Step 3: Cross multiply
   1,080.06x = 1,490.56 × 614.31
4. Step 4: Simplify right side
   1,080.06x = 915,665.91
5. Step 5: Solve for x
   x = 915,665.91/1,080.06
6. Step 6: Final answer
   x = 847.79