Finding the Third Proportional to 21,446 and 28,821

Step by Step Solution

1. Step 1: Write the proportion equation
   21,446 : 28,821 = 28,821 : x
2. Step 2: Convert to fraction form
   21,446/28,821 = 28,821/x
3. Step 3: Cross multiply
   21,446x = 28,821 × 28,821
4. Step 4: Simplify right side
   21,446x = 830,650,041
5. Step 5: Solve for x
   x = 830,650,041/21,446
6. Step 6: Final answer
   x = 38,732.17