Finding the Third Proportional to 5,256 and 10,809

Step by Step Solution

1. Step 1: Write the proportion equation
   5,256 : 10,809 = 10,809 : x
2. Step 2: Convert to fraction form
   5,256/10,809 = 10,809/x
3. Step 3: Cross multiply
   5,256x = 10,809 × 10,809
4. Step 4: Simplify right side
   5,256x = 116,834,481
5. Step 5: Solve for x
   x = 116,834,481/5,256
6. Step 6: Final answer
   x = 22,228.78