Finding the Fourth Proportional to 2,660.78, 3,984.72 and 2,268.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.78 : 3,984.72 = 2,268.54 : x
2. Step 2: Convert to fraction form
   2,660.78/3,984.72 = 2,268.54/x
3. Step 3: Cross multiply
   2,660.78x = 3,984.72 × 2,268.54
4. Step 4: Simplify right side
   2,660.78x = 9,039,496.71
5. Step 5: Solve for x
   x = 9,039,496.71/2,660.78
6. Step 6: Final answer
   x = 3,397.32