Finding the Third Proportional to 8,397,686 and 12,594,345

Step by Step Solution

1. Step 1: Write the proportion equation
   8,397,686 : 12,594,345 = 12,594,345 : x
2. Step 2: Convert to fraction form
   8,397,686/12,594,345 = 12,594,345/x
3. Step 3: Cross multiply
   8,397,686x = 12,594,345 × 12,594,345
4. Step 4: Simplify right side
   8,397,686x = 158,617,525,979,025
5. Step 5: Solve for x
   x = 158,617,525,979,025/8,397,686
6. Step 6: Final answer
   x = 18,888,242.07