Finding the Fourth Proportional to 1,144.32, 1,578.72 and 702.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.32 : 1,578.72 = 702.24 : x
2. Step 2: Convert to fraction form
   1,144.32/1,578.72 = 702.24/x
3. Step 3: Cross multiply
   1,144.32x = 1,578.72 × 702.24
4. Step 4: Simplify right side
   1,144.32x = 1,108,640.33
5. Step 5: Solve for x
   x = 1,108,640.33/1,144.32
6. Step 6: Final answer
   x = 968.82