Finding the Third Proportional to 3,905,145 and 8,409,744

Step by Step Solution

1. Step 1: Write the proportion equation
   3,905,145 : 8,409,744 = 8,409,744 : x
2. Step 2: Convert to fraction form
   3,905,145/8,409,744 = 8,409,744/x
3. Step 3: Cross multiply
   3,905,145x = 8,409,744 × 8,409,744
4. Step 4: Simplify right side
   3,905,145x = 70,723,794,145,536
5. Step 5: Solve for x
   x = 70,723,794,145,536/3,905,145
6. Step 6: Final answer
   x = 18,110,414.38