Finding the Fourth Proportional to 2,572.72, 3,550.36 and 1,393.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.72 : 3,550.36 = 1,393.79 : x
2. Step 2: Convert to fraction form
   2,572.72/3,550.36 = 1,393.79/x
3. Step 3: Cross multiply
   2,572.72x = 3,550.36 × 1,393.79
4. Step 4: Simplify right side
   2,572.72x = 4,948,449.30
5. Step 5: Solve for x
   x = 4,948,449.30/2,572.72
6. Step 6: Final answer
   x = 1,923.43