Finding the Third Proportional to 3,863,731 and 8,391,176

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863,731 : 8,391,176 = 8,391,176 : x
2. Step 2: Convert to fraction form
   3,863,731/8,391,176 = 8,391,176/x
3. Step 3: Cross multiply
   3,863,731x = 8,391,176 × 8,391,176
4. Step 4: Simplify right side
   3,863,731x = 70,411,834,662,976
5. Step 5: Solve for x
   x = 70,411,834,662,976/3,863,731
6. Step 6: Final answer
   x = 18,223,793.18