Finding the Fourth Proportional to 2,399.72, 3,600.48 and 939.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.72 : 3,600.48 = 939.88 : x
2. Step 2: Convert to fraction form
   2,399.72/3,600.48 = 939.88/x
3. Step 3: Cross multiply
   2,399.72x = 3,600.48 × 939.88
4. Step 4: Simplify right side
   2,399.72x = 3,384,019.14
5. Step 5: Solve for x
   x = 3,384,019.14/2,399.72
6. Step 6: Final answer
   x = 1,410.17