Finding the Third Proportional to 213,742 and 333,554

Step by Step Solution

1. Step 1: Write the proportion equation
   213,742 : 333,554 = 333,554 : x
2. Step 2: Convert to fraction form
   213,742/333,554 = 333,554/x
3. Step 3: Cross multiply
   213,742x = 333,554 × 333,554
4. Step 4: Simplify right side
   213,742x = 111,258,270,916
5. Step 5: Solve for x
   x = 111,258,270,916/213,742
6. Step 6: Final answer
   x = 520,526.01