Finding the Third Proportional to 279,018 and 404,919

Step by Step Solution

1. Step 1: Write the proportion equation
   279,018 : 404,919 = 404,919 : x
2. Step 2: Convert to fraction form
   279,018/404,919 = 404,919/x
3. Step 3: Cross multiply
   279,018x = 404,919 × 404,919
4. Step 4: Simplify right side
   279,018x = 163,959,396,561
5. Step 5: Solve for x
   x = 163,959,396,561/279,018
6. Step 6: Final answer
   x = 587,630.18