Finding the Third Proportional to 21,447 and 28,636

Step by Step Solution

1. Step 1: Write the proportion equation
   21,447 : 28,636 = 28,636 : x
2. Step 2: Convert to fraction form
   21,447/28,636 = 28,636/x
3. Step 3: Cross multiply
   21,447x = 28,636 × 28,636
4. Step 4: Simplify right side
   21,447x = 820,020,496
5. Step 5: Solve for x
   x = 820,020,496/21,447
6. Step 6: Final answer
   x = 38,234.74