Finding the Third Proportional to 3,940,454 and 8,553,478

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,454 : 8,553,478 = 8,553,478 : x
2. Step 2: Convert to fraction form
   3,940,454/8,553,478 = 8,553,478/x
3. Step 3: Cross multiply
   3,940,454x = 8,553,478 × 8,553,478
4. Step 4: Simplify right side
   3,940,454x = 73,161,985,896,484
5. Step 5: Solve for x
   x = 73,161,985,896,484/3,940,454
6. Step 6: Final answer
   x = 18,566,892.52