Finding the Fourth Proportional to 2,274.57, 3,139.02 and 1,279.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.57 : 3,139.02 = 1,279.89 : x
2. Step 2: Convert to fraction form
   2,274.57/3,139.02 = 1,279.89/x
3. Step 3: Cross multiply
   2,274.57x = 3,139.02 × 1,279.89
4. Step 4: Simplify right side
   2,274.57x = 4,017,600.31
5. Step 5: Solve for x
   x = 4,017,600.31/2,274.57
6. Step 6: Final answer
   x = 1,766.31