Finding the Third Proportional to 3,863,717 and 8,391,148

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863,717 : 8,391,148 = 8,391,148 : x
2. Step 2: Convert to fraction form
   3,863,717/8,391,148 = 8,391,148/x
3. Step 3: Cross multiply
   3,863,717x = 8,391,148 × 8,391,148
4. Step 4: Simplify right side
   3,863,717x = 70,411,364,757,904
5. Step 5: Solve for x
   x = 70,411,364,757,904/3,863,717
6. Step 6: Final answer
   x = 18,223,737.60