Finding the Fourth Proportional to 2,399.18, 3,598.88 and 839.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.18 : 3,598.88 = 839.34 : x
2. Step 2: Convert to fraction form
   2,399.18/3,598.88 = 839.34/x
3. Step 3: Cross multiply
   2,399.18x = 3,598.88 × 839.34
4. Step 4: Simplify right side
   2,399.18x = 3,020,679.74
5. Step 5: Solve for x
   x = 3,020,679.74/2,399.18
6. Step 6: Final answer
   x = 1,259.05