Finding the Fourth Proportional to 2,080.32, 3,105.28 and 1,928

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.32 : 3,105.28 = 1,928 : x
2. Step 2: Convert to fraction form
   2,080.32/3,105.28 = 1,928/x
3. Step 3: Cross multiply
   2,080.32x = 3,105.28 × 1,928
4. Step 4: Simplify right side
   2,080.32x = 5,986,979.84
5. Step 5: Solve for x
   x = 5,986,979.84/2,080.32
6. Step 6: Final answer
   x = 2,877.91