Finding the Third Proportional to 5,403,393 and 8,216,491

Step by Step Solution

1. Step 1: Write the proportion equation
   5,403,393 : 8,216,491 = 8,216,491 : x
2. Step 2: Convert to fraction form
   5,403,393/8,216,491 = 8,216,491/x
3. Step 3: Cross multiply
   5,403,393x = 8,216,491 × 8,216,491
4. Step 4: Simplify right side
   5,403,393x = 67,510,724,353,081
5. Step 5: Solve for x
   x = 67,510,724,353,081/5,403,393
6. Step 6: Final answer
   x = 12,494,135.51