Finding the Fourth Proportional to 2,928.09, 4,390.72 and 1,080.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.09 : 4,390.72 = 1,080.08 : x
2. Step 2: Convert to fraction form
   2,928.09/4,390.72 = 1,080.08/x
3. Step 3: Cross multiply
   2,928.09x = 4,390.72 × 1,080.08
4. Step 4: Simplify right side
   2,928.09x = 4,742,304.20
5. Step 5: Solve for x
   x = 4,742,304.20/2,928.09
6. Step 6: Final answer
   x = 1,619.59