Finding the Third Proportional to 8,720 and 10,808

Step by Step Solution

1. Step 1: Write the proportion equation
   8,720 : 10,808 = 10,808 : x
2. Step 2: Convert to fraction form
   8,720/10,808 = 10,808/x
3. Step 3: Cross multiply
   8,720x = 10,808 × 10,808
4. Step 4: Simplify right side
   8,720x = 116,812,864
5. Step 5: Solve for x
   x = 116,812,864/8,720
6. Step 6: Final answer
   x = 13,395.97