Finding the Third Proportional to 217,828 and 333,150

Step by Step Solution

1. Step 1: Write the proportion equation
   217,828 : 333,150 = 333,150 : x
2. Step 2: Convert to fraction form
   217,828/333,150 = 333,150/x
3. Step 3: Cross multiply
   217,828x = 333,150 × 333,150
4. Step 4: Simplify right side
   217,828x = 110,988,922,500
5. Step 5: Solve for x
   x = 110,988,922,500/217,828
6. Step 6: Final answer
   x = 509,525.51