Finding the Third Proportional to 3,987,798 and 8,648,652

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,798 : 8,648,652 = 8,648,652 : x
2. Step 2: Convert to fraction form
   3,987,798/8,648,652 = 8,648,652/x
3. Step 3: Cross multiply
   3,987,798x = 8,648,652 × 8,648,652
4. Step 4: Simplify right side
   3,987,798x = 74,799,181,417,104
5. Step 5: Solve for x
   x = 74,799,181,417,104/3,987,798
6. Step 6: Final answer
   x = 18,757,013.62