Finding the Third Proportional to 4,004,640 and 8,540,856

Step by Step Solution

1. Step 1: Write the proportion equation
   4,004,640 : 8,540,856 = 8,540,856 : x
2. Step 2: Convert to fraction form
   4,004,640/8,540,856 = 8,540,856/x
3. Step 3: Cross multiply
   4,004,640x = 8,540,856 × 8,540,856
4. Step 4: Simplify right side
   4,004,640x = 72,946,221,212,736
5. Step 5: Solve for x
   x = 72,946,221,212,736/4,004,640
6. Step 6: Final answer
   x = 18,215,425.41