Finding the Fourth Proportional to 12,185.27, 18,278.55 and 3,865.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.27 : 18,278.55 = 3,865.95 : x
2. Step 2: Convert to fraction form
   12,185.27/18,278.55 = 3,865.95/x
3. Step 3: Cross multiply
   12,185.27x = 18,278.55 × 3,865.95
4. Step 4: Simplify right side
   12,185.27x = 70,663,882.16
5. Step 5: Solve for x
   x = 70,663,882.16/12,185.27
6. Step 6: Final answer
   x = 5,799.13