Finding the Fourth Proportional to 13,105.82, 18,086.42 and 7,440.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.82 : 18,086.42 = 7,440.46 : x
2. Step 2: Convert to fraction form
   13,105.82/18,086.42 = 7,440.46/x
3. Step 3: Cross multiply
   13,105.82x = 18,086.42 × 7,440.46
4. Step 4: Simplify right side
   13,105.82x = 134,571,257.94
5. Step 5: Solve for x
   x = 134,571,257.94/13,105.82
6. Step 6: Final answer
   x = 10,268.05