Finding the Third Proportional to 81,012 and 126,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,012 : 126,636.50 = 126,636.50 : x
2. Step 2: Convert to fraction form
   81,012/126,636.50 = 126,636.50/x
3. Step 3: Cross multiply
   81,012x = 126,636.50 × 126,636.50
4. Step 4: Simplify right side
   81,012x = 16,036,803,132.25
5. Step 5: Solve for x
   x = 16,036,803,132.25/81,012
6. Step 6: Final answer
   x = 197,955.90