Finding the Fourth Proportional to 2,274.91, 3,139.40 and 1,280.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.91 : 3,139.40 = 1,280.18 : x
2. Step 2: Convert to fraction form
   2,274.91/3,139.40 = 1,280.18/x
3. Step 3: Cross multiply
   2,274.91x = 3,139.40 × 1,280.18
4. Step 4: Simplify right side
   2,274.91x = 4,018,997.09
5. Step 5: Solve for x
   x = 4,018,997.09/2,274.91
6. Step 6: Final answer
   x = 1,766.66