Finding the Fourth Proportional to 10,826.88, 16,243.20 and 3,431.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,826.88 : 16,243.20 = 3,431.49 : x
2. Step 2: Convert to fraction form
   10,826.88/16,243.20 = 3,431.49/x
3. Step 3: Cross multiply
   10,826.88x = 16,243.20 × 3,431.49
4. Step 4: Simplify right side
   10,826.88x = 55,738,378.37
5. Step 5: Solve for x
   x = 55,738,378.37/10,826.88
6. Step 6: Final answer
   x = 5,148.15