Finding the Fourth Proportional to 12,399.04, 18,601.29 and 4,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.04 : 18,601.29 = 4,078.72 : x
2. Step 2: Convert to fraction form
   12,399.04/18,601.29 = 4,078.72/x
3. Step 3: Cross multiply
   12,399.04x = 18,601.29 × 4,078.72
4. Step 4: Simplify right side
   12,399.04x = 75,869,407.05
5. Step 5: Solve for x
   x = 75,869,407.05/12,399.04
6. Step 6: Final answer
   x = 6,118.98