Finding the Third Proportional to 10,057 and 21,991

Step by Step Solution

1. Step 1: Write the proportion equation
   10,057 : 21,991 = 21,991 : x
2. Step 2: Convert to fraction form
   10,057/21,991 = 21,991/x
3. Step 3: Cross multiply
   10,057x = 21,991 × 21,991
4. Step 4: Simplify right side
   10,057x = 483,604,081
5. Step 5: Solve for x
   x = 483,604,081/10,057
6. Step 6: Final answer
   x = 48,086.32