Finding the Third Proportional to 404,934 and 643,569

Step by Step Solution

1. Step 1: Write the proportion equation
   404,934 : 643,569 = 643,569 : x
2. Step 2: Convert to fraction form
   404,934/643,569 = 643,569/x
3. Step 3: Cross multiply
   404,934x = 643,569 × 643,569
4. Step 4: Simplify right side
   404,934x = 414,181,057,761
5. Step 5: Solve for x
   x = 414,181,057,761/404,934
6. Step 6: Final answer
   x = 1,022,835.96