Finding the Fourth Proportional to 12,186.15, 18,279.88 and 3,866.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,186.15 : 18,279.88 = 3,866.82 : x
2. Step 2: Convert to fraction form
   12,186.15/18,279.88 = 3,866.82/x
3. Step 3: Cross multiply
   12,186.15x = 18,279.88 × 3,866.82
4. Step 4: Simplify right side
   12,186.15x = 70,685,005.58
5. Step 5: Solve for x
   x = 70,685,005.58/12,186.15
6. Step 6: Final answer
   x = 5,800.44