Finding the Third Proportional to 8,309,799 and 12,764,866.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,799 : 12,764,866.50 = 12,764,866.50 : x
2. Step 2: Convert to fraction form
   8,309,799/12,764,866.50 = 12,764,866.50/x
3. Step 3: Cross multiply
   8,309,799x = 12,764,866.50 × 12,764,866.50
4. Step 4: Simplify right side
   8,309,799x = 162,941,816,762,822.25
5. Step 5: Solve for x
   x = 162,941,816,762,822.25/8,309,799
6. Step 6: Final answer
   x = 19,608,394.47