Finding the Fourth Proportional to 2,928.08, 4,389.59 and 1,078.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.08 : 4,389.59 = 1,078.25 : x
2. Step 2: Convert to fraction form
   2,928.08/4,389.59 = 1,078.25/x
3. Step 3: Cross multiply
   2,928.08x = 4,389.59 × 1,078.25
4. Step 4: Simplify right side
   2,928.08x = 4,733,056.17
5. Step 5: Solve for x
   x = 4,733,056.17/2,928.08
6. Step 6: Final answer
   x = 1,616.44