Finding the Third Proportional to 4,039,016 and 8,645,518

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039,016 : 8,645,518 = 8,645,518 : x
2. Step 2: Convert to fraction form
   4,039,016/8,645,518 = 8,645,518/x
3. Step 3: Cross multiply
   4,039,016x = 8,645,518 × 8,645,518
4. Step 4: Simplify right side
   4,039,016x = 74,744,981,488,324
5. Step 5: Solve for x
   x = 74,744,981,488,324/4,039,016
6. Step 6: Final answer
   x = 18,505,740.38