Finding the Fourth Proportional to 1,144.17, 1,578.84 and 702.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.17 : 1,578.84 = 702.09 : x
2. Step 2: Convert to fraction form
   1,144.17/1,578.84 = 702.09/x
3. Step 3: Cross multiply
   1,144.17x = 1,578.84 × 702.09
4. Step 4: Simplify right side
   1,144.17x = 1,108,487.78
5. Step 5: Solve for x
   x = 1,108,487.78/1,144.17
6. Step 6: Final answer
   x = 968.81