Finding the Third Proportional to 6,690 and 10,545

Step by Step Solution

1. Step 1: Write the proportion equation
   6,690 : 10,545 = 10,545 : x
2. Step 2: Convert to fraction form
   6,690/10,545 = 10,545/x
3. Step 3: Cross multiply
   6,690x = 10,545 × 10,545
4. Step 4: Simplify right side
   6,690x = 111,197,025
5. Step 5: Solve for x
   x = 111,197,025/6,690
6. Step 6: Final answer
   x = 16,621.38