Finding the Fourth Proportional to 13,811.29, 19,059.04 and 8,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,811.29 : 19,059.04 = 8,442.72 : x
2. Step 2: Convert to fraction form
   13,811.29/19,059.04 = 8,442.72/x
3. Step 3: Cross multiply
   13,811.29x = 19,059.04 × 8,442.72
4. Step 4: Simplify right side
   13,811.29x = 160,910,042.89
5. Step 5: Solve for x
   x = 160,910,042.89/13,811.29
6. Step 6: Final answer
   x = 11,650.62