Finding the Fourth Proportional to 2,308.64, 3,466.80 and 2,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.64 : 3,466.80 = 2,290.72 : x
2. Step 2: Convert to fraction form
   2,308.64/3,466.80 = 2,290.72/x
3. Step 3: Cross multiply
   2,308.64x = 3,466.80 × 2,290.72
4. Step 4: Simplify right side
   2,308.64x = 7,941,468.10
5. Step 5: Solve for x
   x = 7,941,468.10/2,308.64
6. Step 6: Final answer
   x = 3,439.89