Finding the Third Proportional to 200,456 and 404,192

Step by Step Solution

1. Step 1: Write the proportion equation
   200,456 : 404,192 = 404,192 : x
2. Step 2: Convert to fraction form
   200,456/404,192 = 404,192/x
3. Step 3: Cross multiply
   200,456x = 404,192 × 404,192
4. Step 4: Simplify right side
   200,456x = 163,371,172,864
5. Step 5: Solve for x
   x = 163,371,172,864/200,456
6. Step 6: Final answer
   x = 814,997.67