Finding the Third Proportional to 2,640 and 3,816

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640 : 3,816 = 3,816 : x
2. Step 2: Convert to fraction form
   2,640/3,816 = 3,816/x
3. Step 3: Cross multiply
   2,640x = 3,816 × 3,816
4. Step 4: Simplify right side
   2,640x = 14,561,856
5. Step 5: Solve for x
   x = 14,561,856/2,640
6. Step 6: Final answer
   x = 5,515.85