Finding the Fourth Proportional to 12,256.58, 18,388.46 and 3,936.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.58 : 18,388.46 = 3,936.42 : x
2. Step 2: Convert to fraction form
   12,256.58/18,388.46 = 3,936.42/x
3. Step 3: Cross multiply
   12,256.58x = 18,388.46 × 3,936.42
4. Step 4: Simplify right side
   12,256.58x = 72,384,711.55
5. Step 5: Solve for x
   x = 72,384,711.55/12,256.58
6. Step 6: Final answer
   x = 5,905.78