Finding the Third Proportional to 213,629 and 454,870

Step by Step Solution

1. Step 1: Write the proportion equation
   213,629 : 454,870 = 454,870 : x
2. Step 2: Convert to fraction form
   213,629/454,870 = 454,870/x
3. Step 3: Cross multiply
   213,629x = 454,870 × 454,870
4. Step 4: Simplify right side
   213,629x = 206,906,716,900
5. Step 5: Solve for x
   x = 206,906,716,900/213,629
6. Step 6: Final answer
   x = 968,532.91