Finding the Third Proportional to 3,945,406 and 8,490,050

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,406 : 8,490,050 = 8,490,050 : x
2. Step 2: Convert to fraction form
   3,945,406/8,490,050 = 8,490,050/x
3. Step 3: Cross multiply
   3,945,406x = 8,490,050 × 8,490,050
4. Step 4: Simplify right side
   3,945,406x = 72,080,949,002,500
5. Step 5: Solve for x
   x = 72,080,949,002,500/3,945,406
6. Step 6: Final answer
   x = 18,269,589.75