Finding the Third Proportional to 3,942,216 and 8,473,356

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942,216 : 8,473,356 = 8,473,356 : x
2. Step 2: Convert to fraction form
   3,942,216/8,473,356 = 8,473,356/x
3. Step 3: Cross multiply
   3,942,216x = 8,473,356 × 8,473,356
4. Step 4: Simplify right side
   3,942,216x = 71,797,761,902,736
5. Step 5: Solve for x
   x = 71,797,761,902,736/3,942,216
6. Step 6: Final answer
   x = 18,212,538.81