Finding the Third Proportional to 126,605 and 200,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   126,605 : 200,478.50 = 200,478.50 : x
2. Step 2: Convert to fraction form
   126,605/200,478.50 = 200,478.50/x
3. Step 3: Cross multiply
   126,605x = 200,478.50 × 200,478.50
4. Step 4: Simplify right side
   126,605x = 40,191,628,962.25
5. Step 5: Solve for x
   x = 40,191,628,962.25/126,605
6. Step 6: Final answer
   x = 317,456.89