Finding the Third Proportional to 16,197 and 21,621

Step by Step Solution

1. Step 1: Write the proportion equation
   16,197 : 21,621 = 21,621 : x
2. Step 2: Convert to fraction form
   16,197/21,621 = 21,621/x
3. Step 3: Cross multiply
   16,197x = 21,621 × 21,621
4. Step 4: Simplify right side
   16,197x = 467,467,641
5. Step 5: Solve for x
   x = 467,467,641/16,197
6. Step 6: Final answer
   x = 28,861.37