Finding the Third Proportional to 404,793 and 643,371

Step by Step Solution

1. Step 1: Write the proportion equation
   404,793 : 643,371 = 643,371 : x
2. Step 2: Convert to fraction form
   404,793/643,371 = 643,371/x
3. Step 3: Cross multiply
   404,793x = 643,371 × 643,371
4. Step 4: Simplify right side
   404,793x = 413,926,243,641
5. Step 5: Solve for x
   x = 413,926,243,641/404,793
6. Step 6: Final answer
   x = 1,022,562.75