Finding the Fourth Proportional to 1,144.10, 1,578.72 and 696.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.10 : 1,578.72 = 696.08 : x
2. Step 2: Convert to fraction form
   1,144.10/1,578.72 = 696.08/x
3. Step 3: Cross multiply
   1,144.10x = 1,578.72 × 696.08
4. Step 4: Simplify right side
   1,144.10x = 1,098,915.42
5. Step 5: Solve for x
   x = 1,098,915.42/1,144.10
6. Step 6: Final answer
   x = 960.51