Finding the Third Proportional to 126,612 and 200,488

Step by Step Solution

1. Step 1: Write the proportion equation
   126,612 : 200,488 = 200,488 : x
2. Step 2: Convert to fraction form
   126,612/200,488 = 200,488/x
3. Step 3: Cross multiply
   126,612x = 200,488 × 200,488
4. Step 4: Simplify right side
   126,612x = 40,195,438,144
5. Step 5: Solve for x
   x = 40,195,438,144/126,612
6. Step 6: Final answer
   x = 317,469.42