Finding the Fourth Proportional to 13,105.44, 18,086.04 and 7,440.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.44 : 18,086.04 = 7,440.12 : x
2. Step 2: Convert to fraction form
   13,105.44/18,086.04 = 7,440.12/x
3. Step 3: Cross multiply
   13,105.44x = 18,086.04 × 7,440.12
4. Step 4: Simplify right side
   13,105.44x = 134,562,307.92
5. Step 5: Solve for x
   x = 134,562,307.92/13,105.44
6. Step 6: Final answer
   x = 10,267.67