Finding the Third Proportional to 3,886,686 and 8,538,588

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886,686 : 8,538,588 = 8,538,588 : x
2. Step 2: Convert to fraction form
   3,886,686/8,538,588 = 8,538,588/x
3. Step 3: Cross multiply
   3,886,686x = 8,538,588 × 8,538,588
4. Step 4: Simplify right side
   3,886,686x = 72,907,485,033,744
5. Step 5: Solve for x
   x = 72,907,485,033,744/3,886,686
6. Step 6: Final answer
   x = 18,758,264.76