Finding the Third Proportional to 3,987,578 and 8,747,164

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,578 : 8,747,164 = 8,747,164 : x
2. Step 2: Convert to fraction form
   3,987,578/8,747,164 = 8,747,164/x
3. Step 3: Cross multiply
   3,987,578x = 8,747,164 × 8,747,164
4. Step 4: Simplify right side
   3,987,578x = 76,512,878,042,896
5. Step 5: Solve for x
   x = 76,512,878,042,896/3,987,578
6. Step 6: Final answer
   x = 19,187,807.25