Finding the Third Proportional to 5,606,940 and 8,521,218

Step by Step Solution

1. Step 1: Write the proportion equation
   5,606,940 : 8,521,218 = 8,521,218 : x
2. Step 2: Convert to fraction form
   5,606,940/8,521,218 = 8,521,218/x
3. Step 3: Cross multiply
   5,606,940x = 8,521,218 × 8,521,218
4. Step 4: Simplify right side
   5,606,940x = 72,611,156,203,524
5. Step 5: Solve for x
   x = 72,611,156,203,524/5,606,940
6. Step 6: Final answer
   x = 12,950,228.86