Finding the Third Proportional to 126,912 and 300,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   126,912 : 300,661.50 = 300,661.50 : x
2. Step 2: Convert to fraction form
   126,912/300,661.50 = 300,661.50/x
3. Step 3: Cross multiply
   126,912x = 300,661.50 × 300,661.50
4. Step 4: Simplify right side
   126,912x = 90,397,337,582.25
5. Step 5: Solve for x
   x = 90,397,337,582.25/126,912
6. Step 6: Final answer
   x = 712,283.61