Finding the Fourth Proportional to 2,571.83, 3,856.94 and 928.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.83 : 3,856.94 = 928.16 : x
2. Step 2: Convert to fraction form
   2,571.83/3,856.94 = 928.16/x
3. Step 3: Cross multiply
   2,571.83x = 3,856.94 × 928.16
4. Step 4: Simplify right side
   2,571.83x = 3,579,833.50
5. Step 5: Solve for x
   x = 3,579,833.50/2,571.83
6. Step 6: Final answer
   x = 1,391.94