Finding the Fourth Proportional to 12,399.09, 18,599.86 and 4,075.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.09 : 18,599.86 = 4,075.73 : x
2. Step 2: Convert to fraction form
   12,399.09/18,599.86 = 4,075.73/x
3. Step 3: Cross multiply
   12,399.09x = 18,599.86 × 4,075.73
4. Step 4: Simplify right side
   12,399.09x = 75,808,007.40
5. Step 5: Solve for x
   x = 75,808,007.40/12,399.09
6. Step 6: Final answer
   x = 6,114.00