Finding the Fourth Proportional to 1,080.38, 1,491.15 and 706.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.38 : 1,491.15 = 706.72 : x
2. Step 2: Convert to fraction form
   1,080.38/1,491.15 = 706.72/x
3. Step 3: Cross multiply
   1,080.38x = 1,491.15 × 706.72
4. Step 4: Simplify right side
   1,080.38x = 1,053,825.53
5. Step 5: Solve for x
   x = 1,053,825.53/1,080.38
6. Step 6: Final answer
   x = 975.42