Finding the Fourth Proportional to 1,280.34, 1,767.42 and 756.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.34 : 1,767.42 = 756.54 : x
2. Step 2: Convert to fraction form
   1,280.34/1,767.42 = 756.54/x
3. Step 3: Cross multiply
   1,280.34x = 1,767.42 × 756.54
4. Step 4: Simplify right side
   1,280.34x = 1,337,123.93
5. Step 5: Solve for x
   x = 1,337,123.93/1,280.34
6. Step 6: Final answer
   x = 1,044.35