Finding the Third Proportional to 3,998,313 and 8,706,546

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,313 : 8,706,546 = 8,706,546 : x
2. Step 2: Convert to fraction form
   3,998,313/8,706,546 = 8,706,546/x
3. Step 3: Cross multiply
   3,998,313x = 8,706,546 × 8,706,546
4. Step 4: Simplify right side
   3,998,313x = 75,803,943,250,116
5. Step 5: Solve for x
   x = 75,803,943,250,116/3,998,313
6. Step 6: Final answer
   x = 18,958,981.76