Finding the Fourth Proportional to 12,399.95, 18,597.86 and 4,080.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.95 : 18,597.86 = 4,080.07 : x
2. Step 2: Convert to fraction form
   12,399.95/18,597.86 = 4,080.07/x
3. Step 3: Cross multiply
   12,399.95x = 18,597.86 × 4,080.07
4. Step 4: Simplify right side
   12,399.95x = 75,880,477.66
5. Step 5: Solve for x
   x = 75,880,477.66/12,399.95
6. Step 6: Final answer
   x = 6,119.42