Finding the Third Proportional to 161,699 and 333,770

Step by Step Solution

1. Step 1: Write the proportion equation
   161,699 : 333,770 = 333,770 : x
2. Step 2: Convert to fraction form
   161,699/333,770 = 333,770/x
3. Step 3: Cross multiply
   161,699x = 333,770 × 333,770
4. Step 4: Simplify right side
   161,699x = 111,402,412,900
5. Step 5: Solve for x
   x = 111,402,412,900/161,699
6. Step 6: Final answer
   x = 688,949.30