Finding the Third Proportional to 3,861,986 and 8,485,252

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861,986 : 8,485,252 = 8,485,252 : x
2. Step 2: Convert to fraction form
   3,861,986/8,485,252 = 8,485,252/x
3. Step 3: Cross multiply
   3,861,986x = 8,485,252 × 8,485,252
4. Step 4: Simplify right side
   3,861,986x = 71,999,501,503,504
5. Step 5: Solve for x
   x = 71,999,501,503,504/3,861,986
6. Step 6: Final answer
   x = 18,643,128.56