Finding the Third Proportional to 8,309,740 and 12,764,778

Step by Step Solution

1. Step 1: Write the proportion equation
   8,309,740 : 12,764,778 = 12,764,778 : x
2. Step 2: Convert to fraction form
   8,309,740/12,764,778 = 12,764,778/x
3. Step 3: Cross multiply
   8,309,740x = 12,764,778 × 12,764,778
4. Step 4: Simplify right side
   8,309,740x = 162,939,557,389,284
5. Step 5: Solve for x
   x = 162,939,557,389,284/8,309,740
6. Step 6: Final answer
   x = 19,608,261.80