Finding the Third Proportional to 3,947,600 and 8,608,648

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947,600 : 8,608,648 = 8,608,648 : x
2. Step 2: Convert to fraction form
   3,947,600/8,608,648 = 8,608,648/x
3. Step 3: Cross multiply
   3,947,600x = 8,608,648 × 8,608,648
4. Step 4: Simplify right side
   3,947,600x = 74,108,820,387,904
5. Step 5: Solve for x
   x = 74,108,820,387,904/3,947,600
6. Step 6: Final answer
   x = 18,773,133.14