Finding the Third Proportional to 8,721 and 19,105

Step by Step Solution

1. Step 1: Write the proportion equation
   8,721 : 19,105 = 19,105 : x
2. Step 2: Convert to fraction form
   8,721/19,105 = 19,105/x
3. Step 3: Cross multiply
   8,721x = 19,105 × 19,105
4. Step 4: Simplify right side
   8,721x = 365,001,025
5. Step 5: Solve for x
   x = 365,001,025/8,721
6. Step 6: Final answer
   x = 41,853.12