Finding the Third Proportional to 172,919 and 264,626

Step by Step Solution

1. Step 1: Write the proportion equation
   172,919 : 264,626 = 264,626 : x
2. Step 2: Convert to fraction form
   172,919/264,626 = 264,626/x
3. Step 3: Cross multiply
   172,919x = 264,626 × 264,626
4. Step 4: Simplify right side
   172,919x = 70,026,919,876
5. Step 5: Solve for x
   x = 70,026,919,876/172,919
6. Step 6: Final answer
   x = 404,969.49