Finding the Fourth Proportional to 1,280.69, 1,767.52 and 756.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.69 : 1,767.52 = 756.75 : x
2. Step 2: Convert to fraction form
   1,280.69/1,767.52 = 756.75/x
3. Step 3: Cross multiply
   1,280.69x = 1,767.52 × 756.75
4. Step 4: Simplify right side
   1,280.69x = 1,337,570.76
5. Step 5: Solve for x
   x = 1,337,570.76/1,280.69
6. Step 6: Final answer
   x = 1,044.41