Finding the Fourth Proportional to 2,399.38, 3,598.75 and 939.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.38 : 3,598.75 = 939.57 : x
2. Step 2: Convert to fraction form
   2,399.38/3,598.75 = 939.57/x
3. Step 3: Cross multiply
   2,399.38x = 3,598.75 × 939.57
4. Step 4: Simplify right side
   2,399.38x = 3,381,277.54
5. Step 5: Solve for x
   x = 3,381,277.54/2,399.38
6. Step 6: Final answer
   x = 1,409.23