Finding the Fourth Proportional to 12,277.86, 18,418.17 and 3,955.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,277.86 : 18,418.17 = 3,955.98 : x
2. Step 2: Convert to fraction form
   12,277.86/18,418.17 = 3,955.98/x
3. Step 3: Cross multiply
   12,277.86x = 18,418.17 × 3,955.98
4. Step 4: Simplify right side
   12,277.86x = 72,861,912.16
5. Step 5: Solve for x
   x = 72,861,912.16/12,277.86
6. Step 6: Final answer
   x = 5,934.41