Finding the Third Proportional to 10,705 and 15,215

Step by Step Solution

1. Step 1: Write the proportion equation
   10,705 : 15,215 = 15,215 : x
2. Step 2: Convert to fraction form
   10,705/15,215 = 15,215/x
3. Step 3: Cross multiply
   10,705x = 15,215 × 15,215
4. Step 4: Simplify right side
   10,705x = 231,496,225
5. Step 5: Solve for x
   x = 231,496,225/10,705
6. Step 6: Final answer
   x = 21,625.06