Finding the Fourth Proportional to 3,978.25, 5,494.94 and 2,804.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.25 : 5,494.94 = 2,804.56 : x
2. Step 2: Convert to fraction form
   3,978.25/5,494.94 = 2,804.56/x
3. Step 3: Cross multiply
   3,978.25x = 5,494.94 × 2,804.56
4. Step 4: Simplify right side
   3,978.25x = 15,410,871.68
5. Step 5: Solve for x
   x = 15,410,871.68/3,978.25
6. Step 6: Final answer
   x = 3,873.78