Finding the Fourth Proportional to 1,144.55, 1,578.65 and 702.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.55 : 1,578.65 = 702.69 : x
2. Step 2: Convert to fraction form
   1,144.55/1,578.65 = 702.69/x
3. Step 3: Cross multiply
   1,144.55x = 1,578.65 × 702.69
4. Step 4: Simplify right side
   1,144.55x = 1,109,298.06
5. Step 5: Solve for x
   x = 1,109,298.06/1,144.55
6. Step 6: Final answer
   x = 969.20