Finding the Fourth Proportional to 1,080.73, 1,491.28 and 608.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.73 : 1,491.28 = 608.59 : x
2. Step 2: Convert to fraction form
   1,080.73/1,491.28 = 608.59/x
3. Step 3: Cross multiply
   1,080.73x = 1,491.28 × 608.59
4. Step 4: Simplify right side
   1,080.73x = 907,578.10
5. Step 5: Solve for x
   x = 907,578.10/1,080.73
6. Step 6: Final answer
   x = 839.78