Finding the Third Proportional to 8,000,311 and 12,709,055

Step by Step Solution

1. Step 1: Write the proportion equation
   8,000,311 : 12,709,055 = 12,709,055 : x
2. Step 2: Convert to fraction form
   8,000,311/12,709,055 = 12,709,055/x
3. Step 3: Cross multiply
   8,000,311x = 12,709,055 × 12,709,055
4. Step 4: Simplify right side
   8,000,311x = 161,520,078,993,025
5. Step 5: Solve for x
   x = 161,520,078,993,025/8,000,311
6. Step 6: Final answer
   x = 20,189,225.02