Finding the Fourth Proportional to 2,144.97, 2,960.91 and 1,399.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.97 : 2,960.91 = 1,399.57 : x
2. Step 2: Convert to fraction form
   2,144.97/2,960.91 = 1,399.57/x
3. Step 3: Cross multiply
   2,144.97x = 2,960.91 × 1,399.57
4. Step 4: Simplify right side
   2,144.97x = 4,144,000.81
5. Step 5: Solve for x
   x = 4,144,000.81/2,144.97
6. Step 6: Final answer
   x = 1,931.96