Finding the Third Proportional to 15,306.75 and 21,665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,306.75 : 21,665.25 = 21,665.25 : x
2. Step 2: Convert to fraction form
   15,306.75/21,665.25 = 21,665.25/x
3. Step 3: Cross multiply
   15,306.75x = 21,665.25 × 21,665.25
4. Step 4: Simplify right side
   15,306.75x = 469,383,057.56
5. Step 5: Solve for x
   x = 469,383,057.56/15,306.75
6. Step 6: Final answer
   x = 30,665.10