Finding the Fourth Proportional to 12,308.24, 18,458.12 and 3,540.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,308.24 : 18,458.12 = 3,540.80 : x
2. Step 2: Convert to fraction form
   12,308.24/18,458.12 = 3,540.80/x
3. Step 3: Cross multiply
   12,308.24x = 18,458.12 × 3,540.80
4. Step 4: Simplify right side
   12,308.24x = 65,356,511.30
5. Step 5: Solve for x
   x = 65,356,511.30/12,308.24
6. Step 6: Final answer
   x = 5,309.98