Finding the Third Proportional to 10,228 and 21,109

Step by Step Solution

1. Step 1: Write the proportion equation
   10,228 : 21,109 = 21,109 : x
2. Step 2: Convert to fraction form
   10,228/21,109 = 21,109/x
3. Step 3: Cross multiply
   10,228x = 21,109 × 21,109
4. Step 4: Simplify right side
   10,228x = 445,589,881
5. Step 5: Solve for x
   x = 445,589,881/10,228
6. Step 6: Final answer
   x = 43,565.69