Finding the Third Proportional to 16,209 and 21,851

Step by Step Solution

1. Step 1: Write the proportion equation
   16,209 : 21,851 = 21,851 : x
2. Step 2: Convert to fraction form
   16,209/21,851 = 21,851/x
3. Step 3: Cross multiply
   16,209x = 21,851 × 21,851
4. Step 4: Simplify right side
   16,209x = 477,466,201
5. Step 5: Solve for x
   x = 477,466,201/16,209
6. Step 6: Final answer
   x = 29,456.86