Finding the Fourth Proportional to 2,274.26, 3,138.56 and 1,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.26 : 3,138.56 = 1,279.50 : x
2. Step 2: Convert to fraction form
   2,274.26/3,138.56 = 1,279.50/x
3. Step 3: Cross multiply
   2,274.26x = 3,138.56 × 1,279.50
4. Step 4: Simplify right side
   2,274.26x = 4,015,787.52
5. Step 5: Solve for x
   x = 4,015,787.52/2,274.26
6. Step 6: Final answer
   x = 1,765.76