Finding the Fourth Proportional to 2,268.78, 3,131.00 and 1,274.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,268.78 : 3,131.00 = 1,274.07 : x
2. Step 2: Convert to fraction form
   2,268.78/3,131.00 = 1,274.07/x
3. Step 3: Cross multiply
   2,268.78x = 3,131.00 × 1,274.07
4. Step 4: Simplify right side
   2,268.78x = 3,989,106.80
5. Step 5: Solve for x
   x = 3,989,106.80/2,268.78
6. Step 6: Final answer
   x = 1,758.26