Finding the Third Proportional to 10,656 and 20,612

Step by Step Solution

1. Step 1: Write the proportion equation
   10,656 : 20,612 = 20,612 : x
2. Step 2: Convert to fraction form
   10,656/20,612 = 20,612/x
3. Step 3: Cross multiply
   10,656x = 20,612 × 20,612
4. Step 4: Simplify right side
   10,656x = 424,854,544
5. Step 5: Solve for x
   x = 424,854,544/10,656
6. Step 6: Final answer
   x = 39,869.98