Finding the Third Proportional to 12,996,099 and 20,204,910

Step by Step Solution

1. Step 1: Write the proportion equation
   12,996,099 : 20,204,910 = 20,204,910 : x
2. Step 2: Convert to fraction form
   12,996,099/20,204,910 = 20,204,910/x
3. Step 3: Cross multiply
   12,996,099x = 20,204,910 × 20,204,910
4. Step 4: Simplify right side
   12,996,099x = 408,238,388,108,100
5. Step 5: Solve for x
   x = 408,238,388,108,100/12,996,099
6. Step 6: Final answer
   x = 31,412,379.06