Finding the Fourth Proportional to 2,274.24, 3,138.23 and 1,279.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.24 : 3,138.23 = 1,279.87 : x
2. Step 2: Convert to fraction form
   2,274.24/3,138.23 = 1,279.87/x
3. Step 3: Cross multiply
   2,274.24x = 3,138.23 × 1,279.87
4. Step 4: Simplify right side
   2,274.24x = 4,016,521.78
5. Step 5: Solve for x
   x = 4,016,521.78/2,274.24
6. Step 6: Final answer
   x = 1,766.09