Finding the Fourth Proportional to 12,205.50, 18,310.16 and 3,887.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,205.50 : 18,310.16 = 3,887.38 : x
2. Step 2: Convert to fraction form
   12,205.50/18,310.16 = 3,887.38/x
3. Step 3: Cross multiply
   12,205.50x = 18,310.16 × 3,887.38
4. Step 4: Simplify right side
   12,205.50x = 71,178,549.78
5. Step 5: Solve for x
   x = 71,178,549.78/12,205.50
6. Step 6: Final answer
   x = 5,831.68