Finding the Third Proportional to 13,672 and 21,419

Step by Step Solution

1. Step 1: Write the proportion equation
   13,672 : 21,419 = 21,419 : x
2. Step 2: Convert to fraction form
   13,672/21,419 = 21,419/x
3. Step 3: Cross multiply
   13,672x = 21,419 × 21,419
4. Step 4: Simplify right side
   13,672x = 458,773,561
5. Step 5: Solve for x
   x = 458,773,561/13,672
6. Step 6: Final answer
   x = 33,555.70