Finding the Fourth Proportional to 2,398.98, 3,598.86 and 839.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.98 : 3,598.86 = 839.42 : x
2. Step 2: Convert to fraction form
   2,398.98/3,598.86 = 839.42/x
3. Step 3: Cross multiply
   2,398.98x = 3,598.86 × 839.42
4. Step 4: Simplify right side
   2,398.98x = 3,020,955.06
5. Step 5: Solve for x
   x = 3,020,955.06/2,398.98
6. Step 6: Final answer
   x = 1,259.27