Finding the Fourth Proportional to 1,280.56, 1,766.86 and 756.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.56 : 1,766.86 = 756.52 : x
2. Step 2: Convert to fraction form
   1,280.56/1,766.86 = 756.52/x
3. Step 3: Cross multiply
   1,280.56x = 1,766.86 × 756.52
4. Step 4: Simplify right side
   1,280.56x = 1,336,664.93
5. Step 5: Solve for x
   x = 1,336,664.93/1,280.56
6. Step 6: Final answer
   x = 1,043.81