Finding the Fourth Proportional to 3,251.89, 4,879.59 and 2,156.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,251.89 : 4,879.59 = 2,156.77 : x
2. Step 2: Convert to fraction form
   3,251.89/4,879.59 = 2,156.77/x
3. Step 3: Cross multiply
   3,251.89x = 4,879.59 × 2,156.77
4. Step 4: Simplify right side
   3,251.89x = 10,524,153.32
5. Step 5: Solve for x
   x = 10,524,153.32/3,251.89
6. Step 6: Final answer
   x = 3,236.32