Finding the Fourth Proportional to 2,274.92, 3,139.35 and 1,280.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.92 : 3,139.35 = 1,280.16 : x
2. Step 2: Convert to fraction form
   2,274.92/3,139.35 = 1,280.16/x
3. Step 3: Cross multiply
   2,274.92x = 3,139.35 × 1,280.16
4. Step 4: Simplify right side
   2,274.92x = 4,018,870.30
5. Step 5: Solve for x
   x = 4,018,870.30/2,274.92
6. Step 6: Final answer
   x = 1,766.60