Finding the Fourth Proportional to 12,256.87, 18,387.69 and 3,936.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.87 : 18,387.69 = 3,936.24 : x
2. Step 2: Convert to fraction form
   12,256.87/18,387.69 = 3,936.24/x
3. Step 3: Cross multiply
   12,256.87x = 18,387.69 × 3,936.24
4. Step 4: Simplify right side
   12,256.87x = 72,378,341.20
5. Step 5: Solve for x
   x = 72,378,341.20/12,256.87
6. Step 6: Final answer
   x = 5,905.13