Finding the Fourth Proportional to 11,818.33, 17,727.48 and 8,109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,818.33 : 17,727.48 = 8,109.30 : x
2. Step 2: Convert to fraction form
   11,818.33/17,727.48 = 8,109.30/x
3. Step 3: Cross multiply
   11,818.33x = 17,727.48 × 8,109.30
4. Step 4: Simplify right side
   11,818.33x = 143,757,453.56
5. Step 5: Solve for x
   x = 143,757,453.56/11,818.33
6. Step 6: Final answer
   x = 12,163.94