Finding the Third Proportional to 9,455 and 20,728

Step by Step Solution

1. Step 1: Write the proportion equation
   9,455 : 20,728 = 20,728 : x
2. Step 2: Convert to fraction form
   9,455/20,728 = 20,728/x
3. Step 3: Cross multiply
   9,455x = 20,728 × 20,728
4. Step 4: Simplify right side
   9,455x = 429,649,984
5. Step 5: Solve for x
   x = 429,649,984/9,455
6. Step 6: Final answer
   x = 45,441.56