Finding the Fourth Proportional to 2,146.50, 2,960.28 and 1,399.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.50 : 2,960.28 = 1,399.75 : x
2. Step 2: Convert to fraction form
   2,146.50/2,960.28 = 1,399.75/x
3. Step 3: Cross multiply
   2,146.50x = 2,960.28 × 1,399.75
4. Step 4: Simplify right side
   2,146.50x = 4,143,644.53
5. Step 5: Solve for x
   x = 4,143,644.53/2,146.50
6. Step 6: Final answer
   x = 1,930.42