Finding the Fourth Proportional to 2,957.31, 4,081.59 and 2,826.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,957.31 : 4,081.59 = 2,826.09 : x
2. Step 2: Convert to fraction form
   2,957.31/4,081.59 = 2,826.09/x
3. Step 3: Cross multiply
   2,957.31x = 4,081.59 × 2,826.09
4. Step 4: Simplify right side
   2,957.31x = 11,534,940.68
5. Step 5: Solve for x
   x = 11,534,940.68/2,957.31
6. Step 6: Final answer
   x = 3,900.48