Finding the Fourth Proportional to 2,144.09, 2,960.03 and 1,398.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.09 : 2,960.03 = 1,398.49 : x
2. Step 2: Convert to fraction form
   2,144.09/2,960.03 = 1,398.49/x
3. Step 3: Cross multiply
   2,144.09x = 2,960.03 × 1,398.49
4. Step 4: Simplify right side
   2,144.09x = 4,139,572.35
5. Step 5: Solve for x
   x = 4,139,572.35/2,144.09
6. Step 6: Final answer
   x = 1,930.69