Finding the Third Proportional to 3,945,198 and 8,499,843

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,198 : 8,499,843 = 8,499,843 : x
2. Step 2: Convert to fraction form
   3,945,198/8,499,843 = 8,499,843/x
3. Step 3: Cross multiply
   3,945,198x = 8,499,843 × 8,499,843
4. Step 4: Simplify right side
   3,945,198x = 72,247,331,024,649
5. Step 5: Solve for x
   x = 72,247,331,024,649/3,945,198
6. Step 6: Final answer
   x = 18,312,726.26