Finding the Third Proportional to 404,221 and 673,659

Step by Step Solution

1. Step 1: Write the proportion equation
   404,221 : 673,659 = 673,659 : x
2. Step 2: Convert to fraction form
   404,221/673,659 = 673,659/x
3. Step 3: Cross multiply
   404,221x = 673,659 × 673,659
4. Step 4: Simplify right side
   404,221x = 453,816,448,281
5. Step 5: Solve for x
   x = 453,816,448,281/404,221
6. Step 6: Final answer
   x = 1,122,693.89