Finding the Fourth Proportional to 2,274.77, 3,139.14 and 1,280.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.77 : 3,139.14 = 1,280.02 : x
2. Step 2: Convert to fraction form
   2,274.77/3,139.14 = 1,280.02/x
3. Step 3: Cross multiply
   2,274.77x = 3,139.14 × 1,280.02
4. Step 4: Simplify right side
   2,274.77x = 4,018,146.29
5. Step 5: Solve for x
   x = 4,018,146.29/2,274.77
6. Step 6: Final answer
   x = 1,766.40