Finding the Third Proportional to 3,864,789 and 8,395,521

Step by Step Solution

1. Step 1: Write the proportion equation
   3,864,789 : 8,395,521 = 8,395,521 : x
2. Step 2: Convert to fraction form
   3,864,789/8,395,521 = 8,395,521/x
3. Step 3: Cross multiply
   3,864,789x = 8,395,521 × 8,395,521
4. Step 4: Simplify right side
   3,864,789x = 70,484,772,861,441
5. Step 5: Solve for x
   x = 70,484,772,861,441/3,864,789
6. Step 6: Final answer
   x = 18,237,676.85