Finding the Fourth Proportional to 2,274.42, 3,138.71 and 1,279.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.42 : 3,138.71 = 1,279.69 : x
2. Step 2: Convert to fraction form
   2,274.42/3,138.71 = 1,279.69/x
3. Step 3: Cross multiply
   2,274.42x = 3,138.71 × 1,279.69
4. Step 4: Simplify right side
   2,274.42x = 4,016,575.80
5. Step 5: Solve for x
   x = 4,016,575.80/2,274.42
6. Step 6: Final answer
   x = 1,765.98