Finding the Fourth Proportional to 2,016, 3,007.68 and 1,821.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016 : 3,007.68 = 1,821.60 : x
2. Step 2: Convert to fraction form
   2,016/3,007.68 = 1,821.60/x
3. Step 3: Cross multiply
   2,016x = 3,007.68 × 1,821.60
4. Step 4: Simplify right side
   2,016x = 5,478,789.89
5. Step 5: Solve for x
   x = 5,478,789.89/2,016
6. Step 6: Final answer
   x = 2,717.65