Finding the Third Proportional to 339,701 and 694,144

Step by Step Solution

1. Step 1: Write the proportion equation
   339,701 : 694,144 = 694,144 : x
2. Step 2: Convert to fraction form
   339,701/694,144 = 694,144/x
3. Step 3: Cross multiply
   339,701x = 694,144 × 694,144
4. Step 4: Simplify right side
   339,701x = 481,835,892,736
5. Step 5: Solve for x
   x = 481,835,892,736/339,701
6. Step 6: Final answer
   x = 1,418,411.76