Finding the Fourth Proportional to 2,278.33, 3,143.89 and 1,393.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.33 : 3,143.89 = 1,393.99 : x
2. Step 2: Convert to fraction form
   2,278.33/3,143.89 = 1,393.99/x
3. Step 3: Cross multiply
   2,278.33x = 3,143.89 × 1,393.99
4. Step 4: Simplify right side
   2,278.33x = 4,382,551.22
5. Step 5: Solve for x
   x = 4,382,551.22/2,278.33
6. Step 6: Final answer
   x = 1,923.58