Finding the Third Proportional to 187,438 and 404,402

Step by Step Solution

1. Step 1: Write the proportion equation
   187,438 : 404,402 = 404,402 : x
2. Step 2: Convert to fraction form
   187,438/404,402 = 404,402/x
3. Step 3: Cross multiply
   187,438x = 404,402 × 404,402
4. Step 4: Simplify right side
   187,438x = 163,540,977,604
5. Step 5: Solve for x
   x = 163,540,977,604/187,438
6. Step 6: Final answer
   x = 872,507.06