Finding the Third Proportional to 216,785 and 333,630

Step by Step Solution

1. Step 1: Write the proportion equation
   216,785 : 333,630 = 333,630 : x
2. Step 2: Convert to fraction form
   216,785/333,630 = 333,630/x
3. Step 3: Cross multiply
   216,785x = 333,630 × 333,630
4. Step 4: Simplify right side
   216,785x = 111,308,976,900
5. Step 5: Solve for x
   x = 111,308,976,900/216,785
6. Step 6: Final answer
   x = 513,453.32