Finding the Fourth Proportional to 12,185.05, 18,278.22 and 3,865.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.05 : 18,278.22 = 3,865.71 : x
2. Step 2: Convert to fraction form
   12,185.05/18,278.22 = 3,865.71/x
3. Step 3: Cross multiply
   12,185.05x = 18,278.22 × 3,865.71
4. Step 4: Simplify right side
   12,185.05x = 70,658,196.78
5. Step 5: Solve for x
   x = 70,658,196.78/12,185.05
6. Step 6: Final answer
   x = 5,798.76