Finding the Third Proportional to 10,208 and 21,055

Step by Step Solution

1. Step 1: Write the proportion equation
   10,208 : 21,055 = 21,055 : x
2. Step 2: Convert to fraction form
   10,208/21,055 = 21,055/x
3. Step 3: Cross multiply
   10,208x = 21,055 × 21,055
4. Step 4: Simplify right side
   10,208x = 443,313,025
5. Step 5: Solve for x
   x = 443,313,025/10,208
6. Step 6: Final answer
   x = 43,428.00