Finding the Third Proportional to 3,885,120 and 8,243,640

Step by Step Solution

1. Step 1: Write the proportion equation
   3,885,120 : 8,243,640 = 8,243,640 : x
2. Step 2: Convert to fraction form
   3,885,120/8,243,640 = 8,243,640/x
3. Step 3: Cross multiply
   3,885,120x = 8,243,640 × 8,243,640
4. Step 4: Simplify right side
   3,885,120x = 67,957,600,449,600
5. Step 5: Solve for x
   x = 67,957,600,449,600/3,885,120
6. Step 6: Final answer
   x = 17,491,763.56