Finding the Third Proportional to 3,998,416 and 8,706,752

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,416 : 8,706,752 = 8,706,752 : x
2. Step 2: Convert to fraction form
   3,998,416/8,706,752 = 8,706,752/x
3. Step 3: Cross multiply
   3,998,416x = 8,706,752 × 8,706,752
4. Step 4: Simplify right side
   3,998,416x = 75,807,530,389,504
5. Step 5: Solve for x
   x = 75,807,530,389,504/3,998,416
6. Step 6: Final answer
   x = 18,959,390.52