Finding the Fourth Proportional to 2,399.40, 3,598.98 and 838.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.40 : 3,598.98 = 838.92 : x
2. Step 2: Convert to fraction form
   2,399.40/3,598.98 = 838.92/x
3. Step 3: Cross multiply
   2,399.40x = 3,598.98 × 838.92
4. Step 4: Simplify right side
   2,399.40x = 3,019,256.30
5. Step 5: Solve for x
   x = 3,019,256.30/2,399.40
6. Step 6: Final answer
   x = 1,258.34