Finding the Fourth Proportional to 3,158.72, 4,738.72 and 1,078.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,158.72 : 4,738.72 = 1,078.56 : x
2. Step 2: Convert to fraction form
   3,158.72/4,738.72 = 1,078.56/x
3. Step 3: Cross multiply
   3,158.72x = 4,738.72 × 1,078.56
4. Step 4: Simplify right side
   3,158.72x = 5,110,993.84
5. Step 5: Solve for x
   x = 5,110,993.84/3,158.72
6. Step 6: Final answer
   x = 1,618.06