Finding the Third Proportional to 5,304 and 10,720

Step by Step Solution

1. Step 1: Write the proportion equation
   5,304 : 10,720 = 10,720 : x
2. Step 2: Convert to fraction form
   5,304/10,720 = 10,720/x
3. Step 3: Cross multiply
   5,304x = 10,720 × 10,720
4. Step 4: Simplify right side
   5,304x = 114,918,400
5. Step 5: Solve for x
   x = 114,918,400/5,304
6. Step 6: Final answer
   x = 21,666.37