Finding the Third Proportional to 3,992,568 and 8,657,751

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992,568 : 8,657,751 = 8,657,751 : x
2. Step 2: Convert to fraction form
   3,992,568/8,657,751 = 8,657,751/x
3. Step 3: Cross multiply
   3,992,568x = 8,657,751 × 8,657,751
4. Step 4: Simplify right side
   3,992,568x = 74,956,652,378,001
5. Step 5: Solve for x
   x = 74,956,652,378,001/3,992,568
6. Step 6: Final answer
   x = 18,774,045.27