Finding the Fourth Proportional to 2,274.67, 3,138.81 and 1,279.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.67 : 3,138.81 = 1,279.75 : x
2. Step 2: Convert to fraction form
   2,274.67/3,138.81 = 1,279.75/x
3. Step 3: Cross multiply
   2,274.67x = 3,138.81 × 1,279.75
4. Step 4: Simplify right side
   2,274.67x = 4,016,892.10
5. Step 5: Solve for x
   x = 4,016,892.10/2,274.67
6. Step 6: Final answer
   x = 1,765.92