Finding the Third Proportional to 404,212 and 673,646

Step by Step Solution

1. Step 1: Write the proportion equation
   404,212 : 673,646 = 673,646 : x
2. Step 2: Convert to fraction form
   404,212/673,646 = 673,646/x
3. Step 3: Cross multiply
   404,212x = 673,646 × 673,646
4. Step 4: Simplify right side
   404,212x = 453,798,933,316
5. Step 5: Solve for x
   x = 453,798,933,316/404,212
6. Step 6: Final answer
   x = 1,122,675.56