Finding the Third Proportional to 161,644 and 333,242

Step by Step Solution

1. Step 1: Write the proportion equation
   161,644 : 333,242 = 333,242 : x
2. Step 2: Convert to fraction form
   161,644/333,242 = 333,242/x
3. Step 3: Cross multiply
   161,644x = 333,242 × 333,242
4. Step 4: Simplify right side
   161,644x = 111,050,230,564
5. Step 5: Solve for x
   x = 111,050,230,564/161,644
6. Step 6: Final answer
   x = 687,004.97