Finding the Fourth Proportional to 2,398.86, 3,596.79 and 838.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.86 : 3,596.79 = 838.53 : x
2. Step 2: Convert to fraction form
   2,398.86/3,596.79 = 838.53/x
3. Step 3: Cross multiply
   2,398.86x = 3,596.79 × 838.53
4. Step 4: Simplify right side
   2,398.86x = 3,016,016.32
5. Step 5: Solve for x
   x = 3,016,016.32/2,398.86
6. Step 6: Final answer
   x = 1,257.27