Finding the Fourth Proportional to 2,268.78, 3,131.04 and 1,274.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,268.78 : 3,131.04 = 1,274.10 : x
2. Step 2: Convert to fraction form
   2,268.78/3,131.04 = 1,274.10/x
3. Step 3: Cross multiply
   2,268.78x = 3,131.04 × 1,274.10
4. Step 4: Simplify right side
   2,268.78x = 3,989,258.06
5. Step 5: Solve for x
   x = 3,989,258.06/2,268.78
6. Step 6: Final answer
   x = 1,758.33