Finding the Fourth Proportional to 2,274.49, 3,139.05 and 1,280.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.49 : 3,139.05 = 1,280.01 : x
2. Step 2: Convert to fraction form
   2,274.49/3,139.05 = 1,280.01/x
3. Step 3: Cross multiply
   2,274.49x = 3,139.05 × 1,280.01
4. Step 4: Simplify right side
   2,274.49x = 4,018,015.39
5. Step 5: Solve for x
   x = 4,018,015.39/2,274.49
6. Step 6: Final answer
   x = 1,766.56