Finding the Fourth Proportional to 12,399.98, 18,601.59 and 4,077.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.98 : 18,601.59 = 4,077.23 : x
2. Step 2: Convert to fraction form
   12,399.98/18,601.59 = 4,077.23/x
3. Step 3: Cross multiply
   12,399.98x = 18,601.59 × 4,077.23
4. Step 4: Simplify right side
   12,399.98x = 75,842,960.80
5. Step 5: Solve for x
   x = 75,842,960.80/12,399.98
6. Step 6: Final answer
   x = 6,116.38