Finding the Third Proportional to 3,994,860 and 8,628,176

Step by Step Solution

1. Step 1: Write the proportion equation
   3,994,860 : 8,628,176 = 8,628,176 : x
2. Step 2: Convert to fraction form
   3,994,860/8,628,176 = 8,628,176/x
3. Step 3: Cross multiply
   3,994,860x = 8,628,176 × 8,628,176
4. Step 4: Simplify right side
   3,994,860x = 74,445,421,086,976
5. Step 5: Solve for x
   x = 74,445,421,086,976/3,994,860
6. Step 6: Final answer
   x = 18,635,301.63