Finding the Third Proportional to 187,438 and 404,401

Step by Step Solution

1. Step 1: Write the proportion equation
   187,438 : 404,401 = 404,401 : x
2. Step 2: Convert to fraction form
   187,438/404,401 = 404,401/x
3. Step 3: Cross multiply
   187,438x = 404,401 × 404,401
4. Step 4: Simplify right side
   187,438x = 163,540,168,801
5. Step 5: Solve for x
   x = 163,540,168,801/187,438
6. Step 6: Final answer
   x = 872,502.74