Finding the Third Proportional to 3,865,216 and 8,198,144

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865,216 : 8,198,144 = 8,198,144 : x
2. Step 2: Convert to fraction form
   3,865,216/8,198,144 = 8,198,144/x
3. Step 3: Cross multiply
   3,865,216x = 8,198,144 × 8,198,144
4. Step 4: Simplify right side
   3,865,216x = 67,209,565,044,736
5. Step 5: Solve for x
   x = 67,209,565,044,736/3,865,216
6. Step 6: Final answer
   x = 17,388,307.68