Finding the Fourth Proportional to 11,818.48, 17,727.71 and 8,109.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,818.48 : 17,727.71 = 8,109.46 : x
2. Step 2: Convert to fraction form
   11,818.48/17,727.71 = 8,109.46/x
3. Step 3: Cross multiply
   11,818.48x = 17,727.71 × 8,109.46
4. Step 4: Simplify right side
   11,818.48x = 143,762,131.09
5. Step 5: Solve for x
   x = 143,762,131.09/11,818.48
6. Step 6: Final answer
   x = 12,164.18