Finding the Fourth Proportional to 4,078.78, 5,629.82 and 2,400.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,078.78 : 5,629.82 = 2,400.72 : x
2. Step 2: Convert to fraction form
   4,078.78/5,629.82 = 2,400.72/x
3. Step 3: Cross multiply
   4,078.78x = 5,629.82 × 2,400.72
4. Step 4: Simplify right side
   4,078.78x = 13,515,621.47
5. Step 5: Solve for x
   x = 13,515,621.47/4,078.78
6. Step 6: Final answer
   x = 3,313.64