Finding the Third Proportional to 187,488 and 404,439

Step by Step Solution

1. Step 1: Write the proportion equation
   187,488 : 404,439 = 404,439 : x
2. Step 2: Convert to fraction form
   187,488/404,439 = 404,439/x
3. Step 3: Cross multiply
   187,488x = 404,439 × 404,439
4. Step 4: Simplify right side
   187,488x = 163,570,904,721
5. Step 5: Solve for x
   x = 163,570,904,721/187,488
6. Step 6: Final answer
   x = 872,433.99