Finding the Fourth Proportional to 2,398.79, 3,311.25 and 1,404.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.79 : 3,311.25 = 1,404.39 : x
2. Step 2: Convert to fraction form
   2,398.79/3,311.25 = 1,404.39/x
3. Step 3: Cross multiply
   2,398.79x = 3,311.25 × 1,404.39
4. Step 4: Simplify right side
   2,398.79x = 4,650,271.34
5. Step 5: Solve for x
   x = 4,650,271.34/2,398.79
6. Step 6: Final answer
   x = 1,938.59