Finding the Fourth Proportional to 1,080.36, 1,491.12 and 702.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.36 : 1,491.12 = 702.72 : x
2. Step 2: Convert to fraction form
   1,080.36/1,491.12 = 702.72/x
3. Step 3: Cross multiply
   1,080.36x = 1,491.12 × 702.72
4. Step 4: Simplify right side
   1,080.36x = 1,047,836.33
5. Step 5: Solve for x
   x = 1,047,836.33/1,080.36
6. Step 6: Final answer
   x = 969.90