Finding the Third Proportional to 3,998,305 and 8,706,530

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,305 : 8,706,530 = 8,706,530 : x
2. Step 2: Convert to fraction form
   3,998,305/8,706,530 = 8,706,530/x
3. Step 3: Cross multiply
   3,998,305x = 8,706,530 × 8,706,530
4. Step 4: Simplify right side
   3,998,305x = 75,803,664,640,900
5. Step 5: Solve for x
   x = 75,803,664,640,900/3,998,305
6. Step 6: Final answer
   x = 18,958,950.02