Finding the Fourth Proportional to 1,280.24, 1,766.52 and 756.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.24 : 1,766.52 = 756.38 : x
2. Step 2: Convert to fraction form
   1,280.24/1,766.52 = 756.38/x
3. Step 3: Cross multiply
   1,280.24x = 1,766.52 × 756.38
4. Step 4: Simplify right side
   1,280.24x = 1,336,160.40
5. Step 5: Solve for x
   x = 1,336,160.40/1,280.24
6. Step 6: Final answer
   x = 1,043.68