Finding the Fourth Proportional to 1,080.32, 1,490.91 and 608.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.32 : 1,490.91 = 608.25 : x
2. Step 2: Convert to fraction form
   1,080.32/1,490.91 = 608.25/x
3. Step 3: Cross multiply
   1,080.32x = 1,490.91 × 608.25
4. Step 4: Simplify right side
   1,080.32x = 906,846.01
5. Step 5: Solve for x
   x = 906,846.01/1,080.32
6. Step 6: Final answer
   x = 839.43