Finding the Fourth Proportional to 1,280.76, 1,767.33 and 756.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.76 : 1,767.33 = 756.69 : x
2. Step 2: Convert to fraction form
   1,280.76/1,767.33 = 756.69/x
3. Step 3: Cross multiply
   1,280.76x = 1,767.33 × 756.69
4. Step 4: Simplify right side
   1,280.76x = 1,337,320.94
5. Step 5: Solve for x
   x = 1,337,320.94/1,280.76
6. Step 6: Final answer
   x = 1,044.16