Finding the Third Proportional to 4,129,811 and 8,857,493

Step by Step Solution

1. Step 1: Write the proportion equation
   4,129,811 : 8,857,493 = 8,857,493 : x
2. Step 2: Convert to fraction form
   4,129,811/8,857,493 = 8,857,493/x
3. Step 3: Cross multiply
   4,129,811x = 8,857,493 × 8,857,493
4. Step 4: Simplify right side
   4,129,811x = 78,455,182,245,049
5. Step 5: Solve for x
   x = 78,455,182,245,049/4,129,811
6. Step 6: Final answer
   x = 18,997,281.53