Finding the Third Proportional to 216,809 and 333,662

Step by Step Solution

1. Step 1: Write the proportion equation
   216,809 : 333,662 = 333,662 : x
2. Step 2: Convert to fraction form
   216,809/333,662 = 333,662/x
3. Step 3: Cross multiply
   216,809x = 333,662 × 333,662
4. Step 4: Simplify right side
   216,809x = 111,330,330,244
5. Step 5: Solve for x
   x = 111,330,330,244/216,809
6. Step 6: Final answer
   x = 513,494.97