Finding the Third Proportional to 3,647,116 and 8,442,420

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,116 : 8,442,420 = 8,442,420 : x
2. Step 2: Convert to fraction form
   3,647,116/8,442,420 = 8,442,420/x
3. Step 3: Cross multiply
   3,647,116x = 8,442,420 × 8,442,420
4. Step 4: Simplify right side
   3,647,116x = 71,274,455,456,400
5. Step 5: Solve for x
   x = 71,274,455,456,400/3,647,116
6. Step 6: Final answer
   x = 19,542,689.47