Finding the Third Proportional to 16,211 and 21,906

Step by Step Solution

1. Step 1: Write the proportion equation
   16,211 : 21,906 = 21,906 : x
2. Step 2: Convert to fraction form
   16,211/21,906 = 21,906/x
3. Step 3: Cross multiply
   16,211x = 21,906 × 21,906
4. Step 4: Simplify right side
   16,211x = 479,872,836
5. Step 5: Solve for x
   x = 479,872,836/16,211
6. Step 6: Final answer
   x = 29,601.68