Finding the Fourth Proportional to 1,080.25, 1,490.72 and 608.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.25 : 1,490.72 = 608.18 : x
2. Step 2: Convert to fraction form
   1,080.25/1,490.72 = 608.18/x
3. Step 3: Cross multiply
   1,080.25x = 1,490.72 × 608.18
4. Step 4: Simplify right side
   1,080.25x = 906,626.09
5. Step 5: Solve for x
   x = 906,626.09/1,080.25
6. Step 6: Final answer
   x = 839.27