Finding the Third Proportional to 404,208 and 673,639.88

Step by Step Solution

1. Step 1: Write the proportion equation
   404,208 : 673,639.88 = 673,639.88 : x
2. Step 2: Convert to fraction form
   404,208/673,639.88 = 673,639.88/x
3. Step 3: Cross multiply
   404,208x = 673,639.88 × 673,639.88
4. Step 4: Simplify right side
   404,208x = 453,790,681,190.02
5. Step 5: Solve for x
   x = 453,790,681,190.02/404,208
6. Step 6: Final answer
   x = 1,122,666.25