Finding the Fourth Proportional to 12,357, 18,536.30 and 4,960.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,357 : 18,536.30 = 4,960.49 : x
2. Step 2: Convert to fraction form
   12,357/18,536.30 = 4,960.49/x
3. Step 3: Cross multiply
   12,357x = 18,536.30 × 4,960.49
4. Step 4: Simplify right side
   12,357x = 91,949,013.30
5. Step 5: Solve for x
   x = 91,949,013.30/12,357
6. Step 6: Final answer
   x = 7,441.05