Finding the Fourth Proportional to 12,399.82, 18,599.34 and 3,039.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.82 : 18,599.34 = 3,039.86 : x
2. Step 2: Convert to fraction form
   12,399.82/18,599.34 = 3,039.86/x
3. Step 3: Cross multiply
   12,399.82x = 18,599.34 × 3,039.86
4. Step 4: Simplify right side
   12,399.82x = 56,539,436.19
5. Step 5: Solve for x
   x = 56,539,436.19/12,399.82
6. Step 6: Final answer
   x = 4,559.70