Finding the Third Proportional to 3,987,591 and 8,747,185

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,591 : 8,747,185 = 8,747,185 : x
2. Step 2: Convert to fraction form
   3,987,591/8,747,185 = 8,747,185/x
3. Step 3: Cross multiply
   3,987,591x = 8,747,185 × 8,747,185
4. Step 4: Simplify right side
   3,987,591x = 76,513,245,424,225
5. Step 5: Solve for x
   x = 76,513,245,424,225/3,987,591
6. Step 6: Final answer
   x = 19,187,836.82