Finding the Third Proportional to 10,253 and 21,721

Step by Step Solution

1. Step 1: Write the proportion equation
   10,253 : 21,721 = 21,721 : x
2. Step 2: Convert to fraction form
   10,253/21,721 = 21,721/x
3. Step 3: Cross multiply
   10,253x = 21,721 × 21,721
4. Step 4: Simplify right side
   10,253x = 471,801,841
5. Step 5: Solve for x
   x = 471,801,841/10,253
6. Step 6: Final answer
   x = 46,015.98