Finding the Third Proportional to 17,712 and 19,728

Step by Step Solution

1. Step 1: Write the proportion equation
   17,712 : 19,728 = 19,728 : x
2. Step 2: Convert to fraction form
   17,712/19,728 = 19,728/x
3. Step 3: Cross multiply
   17,712x = 19,728 × 19,728
4. Step 4: Simplify right side
   17,712x = 389,193,984
5. Step 5: Solve for x
   x = 389,193,984/17,712
6. Step 6: Final answer
   x = 21,973.46