Finding the Third Proportional to 4,012,686 and 8,679,852

Step by Step Solution

1. Step 1: Write the proportion equation
   4,012,686 : 8,679,852 = 8,679,852 : x
2. Step 2: Convert to fraction form
   4,012,686/8,679,852 = 8,679,852/x
3. Step 3: Cross multiply
   4,012,686x = 8,679,852 × 8,679,852
4. Step 4: Simplify right side
   4,012,686x = 75,339,830,741,904
5. Step 5: Solve for x
   x = 75,339,830,741,904/4,012,686
6. Step 6: Final answer
   x = 18,775,411.47