Finding the Fourth Proportional to 2,274.44, 3,138.72 and 1,279.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.44 : 3,138.72 = 1,279.72 : x
2. Step 2: Convert to fraction form
   2,274.44/3,138.72 = 1,279.72/x
3. Step 3: Cross multiply
   2,274.44x = 3,138.72 × 1,279.72
4. Step 4: Simplify right side
   2,274.44x = 4,016,682.76
5. Step 5: Solve for x
   x = 4,016,682.76/2,274.44
6. Step 6: Final answer
   x = 1,766.01