Finding the Third Proportional to 3,942,238 and 8,473,400

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942,238 : 8,473,400 = 8,473,400 : x
2. Step 2: Convert to fraction form
   3,942,238/8,473,400 = 8,473,400/x
3. Step 3: Cross multiply
   3,942,238x = 8,473,400 × 8,473,400
4. Step 4: Simplify right side
   3,942,238x = 71,798,507,560,000
5. Step 5: Solve for x
   x = 71,798,507,560,000/3,942,238
6. Step 6: Final answer
   x = 18,212,626.32