Finding the Third Proportional to 3,942,240 and 8,473,404

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942,240 : 8,473,404 = 8,473,404 : x
2. Step 2: Convert to fraction form
   3,942,240/8,473,404 = 8,473,404/x
3. Step 3: Cross multiply
   3,942,240x = 8,473,404 × 8,473,404
4. Step 4: Simplify right side
   3,942,240x = 71,798,575,347,216
5. Step 5: Solve for x
   x = 71,798,575,347,216/3,942,240
6. Step 6: Final answer
   x = 18,212,634.28