Finding the Third Proportional to 7,662 and 12,645

Step by Step Solution

1. Step 1: Write the proportion equation
   7,662 : 12,645 = 12,645 : x
2. Step 2: Convert to fraction form
   7,662/12,645 = 12,645/x
3. Step 3: Cross multiply
   7,662x = 12,645 × 12,645
4. Step 4: Simplify right side
   7,662x = 159,896,025
5. Step 5: Solve for x
   x = 159,896,025/7,662
6. Step 6: Final answer
   x = 20,868.71