Finding the Third Proportional to 6,987 and 10,809

Step by Step Solution

1. Step 1: Write the proportion equation
   6,987 : 10,809 = 10,809 : x
2. Step 2: Convert to fraction form
   6,987/10,809 = 10,809/x
3. Step 3: Cross multiply
   6,987x = 10,809 × 10,809
4. Step 4: Simplify right side
   6,987x = 116,834,481
5. Step 5: Solve for x
   x = 116,834,481/6,987
6. Step 6: Final answer
   x = 16,721.69