Finding the Fourth Proportional to 13,239.77, 18,270.89 and 7,271.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,239.77 : 18,270.89 = 7,271.73 : x
2. Step 2: Convert to fraction form
   13,239.77/18,270.89 = 7,271.73/x
3. Step 3: Cross multiply
   13,239.77x = 18,270.89 × 7,271.73
4. Step 4: Simplify right side
   13,239.77x = 132,860,942.58
5. Step 5: Solve for x
   x = 132,860,942.58/13,239.77
6. Step 6: Final answer
   x = 10,034.99