Finding the Fourth Proportional to 2,274.80, 3,138.81 and 1,279.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.80 : 3,138.81 = 1,279.71 : x
2. Step 2: Convert to fraction form
   2,274.80/3,138.81 = 1,279.71/x
3. Step 3: Cross multiply
   2,274.80x = 3,138.81 × 1,279.71
4. Step 4: Simplify right side
   2,274.80x = 4,016,766.55
5. Step 5: Solve for x
   x = 4,016,766.55/2,274.80
6. Step 6: Final answer
   x = 1,765.77