Finding the Fourth Proportional to 13,081.50, 18,027.36 and 8,357.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.50 : 18,027.36 = 8,357.58 : x
2. Step 2: Convert to fraction form
   13,081.50/18,027.36 = 8,357.58/x
3. Step 3: Cross multiply
   13,081.50x = 18,027.36 × 8,357.58
4. Step 4: Simplify right side
   13,081.50x = 150,665,103.39
5. Step 5: Solve for x
   x = 150,665,103.39/13,081.50
6. Step 6: Final answer
   x = 11,517.42