Finding the Third Proportional to 3,987,588 and 8,772,648

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,588 : 8,772,648 = 8,772,648 : x
2. Step 2: Convert to fraction form
   3,987,588/8,772,648 = 8,772,648/x
3. Step 3: Cross multiply
   3,987,588x = 8,772,648 × 8,772,648
4. Step 4: Simplify right side
   3,987,588x = 76,959,352,931,904
5. Step 5: Solve for x
   x = 76,959,352,931,904/3,987,588
6. Step 6: Final answer
   x = 19,299,725.28