Finding the Fourth Proportional to 12,443.19, 18,676.50 and 8,286.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.19 : 18,676.50 = 8,286.10 : x
2. Step 2: Convert to fraction form
   12,443.19/18,676.50 = 8,286.10/x
3. Step 3: Cross multiply
   12,443.19x = 18,676.50 × 8,286.10
4. Step 4: Simplify right side
   12,443.19x = 154,755,401.07
5. Step 5: Solve for x
   x = 154,755,401.07/12,443.19
6. Step 6: Final answer
   x = 12,436.96