Finding the Third Proportional to 3,987,584 and 8,747,173

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,584 : 8,747,173 = 8,747,173 : x
2. Step 2: Convert to fraction form
   3,987,584/8,747,173 = 8,747,173/x
3. Step 3: Cross multiply
   3,987,584x = 8,747,173 × 8,747,173
4. Step 4: Simplify right side
   3,987,584x = 76,513,035,491,929
5. Step 5: Solve for x
   x = 76,513,035,491,929/3,987,584
6. Step 6: Final answer
   x = 19,187,817.86