Finding the Fourth Proportional to 2,399.94, 3,599.94 and 839.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.94 : 3,599.94 = 839.94 : x
2. Step 2: Convert to fraction form
   2,399.94/3,599.94 = 839.94/x
3. Step 3: Cross multiply
   2,399.94x = 3,599.94 × 839.94
4. Step 4: Simplify right side
   2,399.94x = 3,023,733.60
5. Step 5: Solve for x
   x = 3,023,733.60/2,399.94
6. Step 6: Final answer
   x = 1,259.92