Finding the Fourth Proportional to 2,553.12, 3,828.33 and 1,928.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.12 : 3,828.33 = 1,928.61 : x
2. Step 2: Convert to fraction form
   2,553.12/3,828.33 = 1,928.61/x
3. Step 3: Cross multiply
   2,553.12x = 3,828.33 × 1,928.61
4. Step 4: Simplify right side
   2,553.12x = 7,383,355.52
5. Step 5: Solve for x
   x = 7,383,355.52/2,553.12
6. Step 6: Final answer
   x = 2,891.90