Finding the Third Proportional to 5,507,666 and 8,419,251

Step by Step Solution

1. Step 1: Write the proportion equation
   5,507,666 : 8,419,251 = 8,419,251 : x
2. Step 2: Convert to fraction form
   5,507,666/8,419,251 = 8,419,251/x
3. Step 3: Cross multiply
   5,507,666x = 8,419,251 × 8,419,251
4. Step 4: Simplify right side
   5,507,666x = 70,883,787,401,001
5. Step 5: Solve for x
   x = 70,883,787,401,001/5,507,666
6. Step 6: Final answer
   x = 12,870,022.87