Finding the Third Proportional to 3,863,090 and 8,397,860

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863,090 : 8,397,860 = 8,397,860 : x
2. Step 2: Convert to fraction form
   3,863,090/8,397,860 = 8,397,860/x
3. Step 3: Cross multiply
   3,863,090x = 8,397,860 × 8,397,860
4. Step 4: Simplify right side
   3,863,090x = 70,524,052,579,600
5. Step 5: Solve for x
   x = 70,524,052,579,600/3,863,090
6. Step 6: Final answer
   x = 18,255,865.79