Finding the Fourth Proportional to 2,572.78, 3,550.42 and 1,393.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.78 : 3,550.42 = 1,393.84 : x
2. Step 2: Convert to fraction form
   2,572.78/3,550.42 = 1,393.84/x
3. Step 3: Cross multiply
   2,572.78x = 3,550.42 × 1,393.84
4. Step 4: Simplify right side
   2,572.78x = 4,948,717.41
5. Step 5: Solve for x
   x = 4,948,717.41/2,572.78
6. Step 6: Final answer
   x = 1,923.49