Finding the Fourth Proportional to 2,928.09, 4,392.56 and 1,079.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.09 : 4,392.56 = 1,079.05 : x
2. Step 2: Convert to fraction form
   2,928.09/4,392.56 = 1,079.05/x
3. Step 3: Cross multiply
   2,928.09x = 4,392.56 × 1,079.05
4. Step 4: Simplify right side
   2,928.09x = 4,739,791.87
5. Step 5: Solve for x
   x = 4,739,791.87/2,928.09
6. Step 6: Final answer
   x = 1,618.73