Finding the Third Proportional to 5,403,396 and 8,216,493

Step by Step Solution

1. Step 1: Write the proportion equation
   5,403,396 : 8,216,493 = 8,216,493 : x
2. Step 2: Convert to fraction form
   5,403,396/8,216,493 = 8,216,493/x
3. Step 3: Cross multiply
   5,403,396x = 8,216,493 × 8,216,493
4. Step 4: Simplify right side
   5,403,396x = 67,510,757,219,049
5. Step 5: Solve for x
   x = 67,510,757,219,049/5,403,396
6. Step 6: Final answer
   x = 12,494,134.66