Finding the Third Proportional to 161,640 and 333,234

Step by Step Solution

1. Step 1: Write the proportion equation
   161,640 : 333,234 = 333,234 : x
2. Step 2: Convert to fraction form
   161,640/333,234 = 333,234/x
3. Step 3: Cross multiply
   161,640x = 333,234 × 333,234
4. Step 4: Simplify right side
   161,640x = 111,044,898,756
5. Step 5: Solve for x
   x = 111,044,898,756/161,640
6. Step 6: Final answer
   x = 686,988.98