Finding the Third Proportional to 10,217 and 21,472

Step by Step Solution

1. Step 1: Write the proportion equation
   10,217 : 21,472 = 21,472 : x
2. Step 2: Convert to fraction form
   10,217/21,472 = 21,472/x
3. Step 3: Cross multiply
   10,217x = 21,472 × 21,472
4. Step 4: Simplify right side
   10,217x = 461,046,784
5. Step 5: Solve for x
   x = 461,046,784/10,217
6. Step 6: Final answer
   x = 45,125.46