Finding the Third Proportional to 9,891 and 10,728

Step by Step Solution

1. Step 1: Write the proportion equation
   9,891 : 10,728 = 10,728 : x
2. Step 2: Convert to fraction form
   9,891/10,728 = 10,728/x
3. Step 3: Cross multiply
   9,891x = 10,728 × 10,728
4. Step 4: Simplify right side
   9,891x = 115,089,984
5. Step 5: Solve for x
   x = 115,089,984/9,891
6. Step 6: Final answer
   x = 11,635.83