Finding the Third Proportional to 10,221 and 21,471

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221 : 21,471 = 21,471 : x
2. Step 2: Convert to fraction form
   10,221/21,471 = 21,471/x
3. Step 3: Cross multiply
   10,221x = 21,471 × 21,471
4. Step 4: Simplify right side
   10,221x = 461,003,841
5. Step 5: Solve for x
   x = 461,003,841/10,221
6. Step 6: Final answer
   x = 45,103.59