Finding the Third Proportional to 3,940,416 and 8,553,384

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,416 : 8,553,384 = 8,553,384 : x
2. Step 2: Convert to fraction form
   3,940,416/8,553,384 = 8,553,384/x
3. Step 3: Cross multiply
   3,940,416x = 8,553,384 × 8,553,384
4. Step 4: Simplify right side
   3,940,416x = 73,160,377,851,456
5. Step 5: Solve for x
   x = 73,160,377,851,456/3,940,416
6. Step 6: Final answer
   x = 18,566,663.48