Finding the Third Proportional to 16,508 and 21,891

Step by Step Solution

1. Step 1: Write the proportion equation
   16,508 : 21,891 = 21,891 : x
2. Step 2: Convert to fraction form
   16,508/21,891 = 21,891/x
3. Step 3: Cross multiply
   16,508x = 21,891 × 21,891
4. Step 4: Simplify right side
   16,508x = 479,215,881
5. Step 5: Solve for x
   x = 479,215,881/16,508
6. Step 6: Final answer
   x = 29,029.31