Finding the Fourth Proportional to 2,760.98, 4,142.49 and 1,280.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.98 : 4,142.49 = 1,280.91 : x
2. Step 2: Convert to fraction form
   2,760.98/4,142.49 = 1,280.91/x
3. Step 3: Cross multiply
   2,760.98x = 4,142.49 × 1,280.91
4. Step 4: Simplify right side
   2,760.98x = 5,306,150.46
5. Step 5: Solve for x
   x = 5,306,150.46/2,760.98
6. Step 6: Final answer
   x = 1,921.84