Finding the Third Proportional to 217,958 and 333,272

Step by Step Solution

1. Step 1: Write the proportion equation
   217,958 : 333,272 = 333,272 : x
2. Step 2: Convert to fraction form
   217,958/333,272 = 333,272/x
3. Step 3: Cross multiply
   217,958x = 333,272 × 333,272
4. Step 4: Simplify right side
   217,958x = 111,070,225,984
5. Step 5: Solve for x
   x = 111,070,225,984/217,958
6. Step 6: Final answer
   x = 509,594.63