Finding the Fourth Proportional to 2,399.28, 3,578.72 and 2,326.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.28 : 3,578.72 = 2,326.40 : x
2. Step 2: Convert to fraction form
   2,399.28/3,578.72 = 2,326.40/x
3. Step 3: Cross multiply
   2,399.28x = 3,578.72 × 2,326.40
4. Step 4: Simplify right side
   2,399.28x = 8,325,534.21
5. Step 5: Solve for x
   x = 8,325,534.21/2,399.28
6. Step 6: Final answer
   x = 3,470.01