Finding the Fourth Proportional to 13,826.54, 19,083.72 and 8,789.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.54 : 19,083.72 = 8,789.78 : x
2. Step 2: Convert to fraction form
   13,826.54/19,083.72 = 8,789.78/x
3. Step 3: Cross multiply
   13,826.54x = 19,083.72 × 8,789.78
4. Step 4: Simplify right side
   13,826.54x = 167,741,700.38
5. Step 5: Solve for x
   x = 167,741,700.38/13,826.54
6. Step 6: Final answer
   x = 12,131.86