Finding the Fourth Proportional to 1,080.27, 1,490.72 and 608.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.27 : 1,490.72 = 608.24 : x
2. Step 2: Convert to fraction form
   1,080.27/1,490.72 = 608.24/x
3. Step 3: Cross multiply
   1,080.27x = 1,490.72 × 608.24
4. Step 4: Simplify right side
   1,080.27x = 906,705.04
5. Step 5: Solve for x
   x = 906,705.04/1,080.27
6. Step 6: Final answer
   x = 839.33