Finding the Fourth Proportional to 12,081.18, 18,123.42 and 11,352.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.18 : 18,123.42 = 11,352.18 : x
2. Step 2: Convert to fraction form
   12,081.18/18,123.42 = 11,352.18/x
3. Step 3: Cross multiply
   12,081.18x = 18,123.42 × 11,352.18
4. Step 4: Simplify right side
   12,081.18x = 205,740,326.06
5. Step 5: Solve for x
   x = 205,740,326.06/12,081.18
6. Step 6: Final answer
   x = 17,029.82