Finding the Third Proportional to 3,909,446 and 8,142,474

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909,446 : 8,142,474 = 8,142,474 : x
2. Step 2: Convert to fraction form
   3,909,446/8,142,474 = 8,142,474/x
3. Step 3: Cross multiply
   3,909,446x = 8,142,474 × 8,142,474
4. Step 4: Simplify right side
   3,909,446x = 66,299,882,840,676
5. Step 5: Solve for x
   x = 66,299,882,840,676/3,909,446
6. Step 6: Final answer
   x = 16,958,894.65