Finding the Fourth Proportional to 2,646.18, 3,965.94 and 2,016.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.18 : 3,965.94 = 2,016.78 : x
2. Step 2: Convert to fraction form
   2,646.18/3,965.94 = 2,016.78/x
3. Step 3: Cross multiply
   2,646.18x = 3,965.94 × 2,016.78
4. Step 4: Simplify right side
   2,646.18x = 7,998,428.47
5. Step 5: Solve for x
   x = 7,998,428.47/2,646.18
6. Step 6: Final answer
   x = 3,022.63