Finding the Third Proportional to 8,486 and 12,089

Step by Step Solution

1. Step 1: Write the proportion equation
   8,486 : 12,089 = 12,089 : x
2. Step 2: Convert to fraction form
   8,486/12,089 = 12,089/x
3. Step 3: Cross multiply
   8,486x = 12,089 × 12,089
4. Step 4: Simplify right side
   8,486x = 146,143,921
5. Step 5: Solve for x
   x = 146,143,921/8,486
6. Step 6: Final answer
   x = 17,221.77