Finding the Fourth Proportional to 12,256.56, 18,387.84 and 3,936.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.56 : 18,387.84 = 3,936.72 : x
2. Step 2: Convert to fraction form
   12,256.56/18,387.84 = 3,936.72/x
3. Step 3: Cross multiply
   12,256.56x = 18,387.84 × 3,936.72
4. Step 4: Simplify right side
   12,256.56x = 72,387,777.48
5. Step 5: Solve for x
   x = 72,387,777.48/12,256.56
6. Step 6: Final answer
   x = 5,906.04