Finding the Third Proportional to 9,900 and 12,846

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900 : 12,846 = 12,846 : x
2. Step 2: Convert to fraction form
   9,900/12,846 = 12,846/x
3. Step 3: Cross multiply
   9,900x = 12,846 × 12,846
4. Step 4: Simplify right side
   9,900x = 165,019,716
5. Step 5: Solve for x
   x = 165,019,716/9,900
6. Step 6: Final answer
   x = 16,668.66