Finding the Third Proportional to 17,220 and 21,996

Step by Step Solution

1. Step 1: Write the proportion equation
   17,220 : 21,996 = 21,996 : x
2. Step 2: Convert to fraction form
   17,220/21,996 = 21,996/x
3. Step 3: Cross multiply
   17,220x = 21,996 × 21,996
4. Step 4: Simplify right side
   17,220x = 483,824,016
5. Step 5: Solve for x
   x = 483,824,016/17,220
6. Step 6: Final answer
   x = 28,096.63