Finding the Fourth Proportional to 12,261.48, 18,391.78 and 3,942.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,261.48 : 18,391.78 = 3,942.06 : x
2. Step 2: Convert to fraction form
   12,261.48/18,391.78 = 3,942.06/x
3. Step 3: Cross multiply
   12,261.48x = 18,391.78 × 3,942.06
4. Step 4: Simplify right side
   12,261.48x = 72,501,500.27
5. Step 5: Solve for x
   x = 72,501,500.27/12,261.48
6. Step 6: Final answer
   x = 5,912.95