Finding the Third Proportional to 12,210 and 16,087

Step by Step Solution

1. Step 1: Write the proportion equation
   12,210 : 16,087 = 16,087 : x
2. Step 2: Convert to fraction form
   12,210/16,087 = 16,087/x
3. Step 3: Cross multiply
   12,210x = 16,087 × 16,087
4. Step 4: Simplify right side
   12,210x = 258,791,569
5. Step 5: Solve for x
   x = 258,791,569/12,210
6. Step 6: Final answer
   x = 21,195.05