Finding the Fourth Proportional to 12,308.50, 18,464.12 and 4,517.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,308.50 : 18,464.12 = 4,517.31 : x
2. Step 2: Convert to fraction form
   12,308.50/18,464.12 = 4,517.31/x
3. Step 3: Cross multiply
   12,308.50x = 18,464.12 × 4,517.31
4. Step 4: Simplify right side
   12,308.50x = 83,408,217.51
5. Step 5: Solve for x
   x = 83,408,217.51/12,308.50
6. Step 6: Final answer
   x = 6,776.47