Finding the Third Proportional to 3,899,524 and 8,415,597

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899,524 : 8,415,597 = 8,415,597 : x
2. Step 2: Convert to fraction form
   3,899,524/8,415,597 = 8,415,597/x
3. Step 3: Cross multiply
   3,899,524x = 8,415,597 × 8,415,597
4. Step 4: Simplify right side
   3,899,524x = 70,822,272,866,409
5. Step 5: Solve for x
   x = 70,822,272,866,409/3,899,524
6. Step 6: Final answer
   x = 18,161,773.81