Finding the Third Proportional to 13,662 and 21,660

Step by Step Solution

1. Step 1: Write the proportion equation
   13,662 : 21,660 = 21,660 : x
2. Step 2: Convert to fraction form
   13,662/21,660 = 21,660/x
3. Step 3: Cross multiply
   13,662x = 21,660 × 21,660
4. Step 4: Simplify right side
   13,662x = 469,155,600
5. Step 5: Solve for x
   x = 469,155,600/13,662
6. Step 6: Final answer
   x = 34,340.18