Finding the Fourth Proportional to 2,274.86, 3,139.28 and 1,280.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.86 : 3,139.28 = 1,280.14 : x
2. Step 2: Convert to fraction form
   2,274.86/3,139.28 = 1,280.14/x
3. Step 3: Cross multiply
   2,274.86x = 3,139.28 × 1,280.14
4. Step 4: Simplify right side
   2,274.86x = 4,018,714.34
5. Step 5: Solve for x
   x = 4,018,714.34/2,274.86
6. Step 6: Final answer
   x = 1,766.57