Finding the Fourth Proportional to 2,144.40, 2,958.78 and 1,357.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.40 : 2,958.78 = 1,357.99 : x
2. Step 2: Convert to fraction form
   2,144.40/2,958.78 = 1,357.99/x
3. Step 3: Cross multiply
   2,144.40x = 2,958.78 × 1,357.99
4. Step 4: Simplify right side
   2,144.40x = 4,017,993.65
5. Step 5: Solve for x
   x = 4,017,993.65/2,144.40
6. Step 6: Final answer
   x = 1,873.71