Finding the Third Proportional to 10,239 and 21,571

Step by Step Solution

1. Step 1: Write the proportion equation
   10,239 : 21,571 = 21,571 : x
2. Step 2: Convert to fraction form
   10,239/21,571 = 21,571/x
3. Step 3: Cross multiply
   10,239x = 21,571 × 21,571
4. Step 4: Simplify right side
   10,239x = 465,308,041
5. Step 5: Solve for x
   x = 465,308,041/10,239
6. Step 6: Final answer
   x = 45,444.68