Finding the Third Proportional to 20,105 and 28,449

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105 : 28,449 = 28,449 : x
2. Step 2: Convert to fraction form
   20,105/28,449 = 28,449/x
3. Step 3: Cross multiply
   20,105x = 28,449 × 28,449
4. Step 4: Simplify right side
   20,105x = 809,345,601
5. Step 5: Solve for x
   x = 809,345,601/20,105
6. Step 6: Final answer
   x = 40,255.94