Finding the Fourth Proportional to 13,826.91, 19,082.78 and 8,729.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.91 : 19,082.78 = 8,729.83 : x
2. Step 2: Convert to fraction form
   13,826.91/19,082.78 = 8,729.83/x
3. Step 3: Cross multiply
   13,826.91x = 19,082.78 × 8,729.83
4. Step 4: Simplify right side
   13,826.91x = 166,589,425.33
5. Step 5: Solve for x
   x = 166,589,425.33/13,826.91
6. Step 6: Final answer
   x = 12,048.20