Finding the Fourth Proportional to 2,928.34, 4,389.83 and 1,078.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.34 : 4,389.83 = 1,078.05 : x
2. Step 2: Convert to fraction form
   2,928.34/4,389.83 = 1,078.05/x
3. Step 3: Cross multiply
   2,928.34x = 4,389.83 × 1,078.05
4. Step 4: Simplify right side
   2,928.34x = 4,732,445.03
5. Step 5: Solve for x
   x = 4,732,445.03/2,928.34
6. Step 6: Final answer
   x = 1,616.08