Finding the Fourth Proportional to 9,540.28, 14,234.27 and 8,137.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,540.28 : 14,234.27 = 8,137.72 : x
2. Step 2: Convert to fraction form
   9,540.28/14,234.27 = 8,137.72/x
3. Step 3: Cross multiply
   9,540.28x = 14,234.27 × 8,137.72
4. Step 4: Simplify right side
   9,540.28x = 115,834,503.66
5. Step 5: Solve for x
   x = 115,834,503.66/9,540.28
6. Step 6: Final answer
   x = 12,141.63