Finding the Fourth Proportional to 2,388.78, 3,296.67 and 1,393.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.78 : 3,296.67 = 1,393.83 : x
2. Step 2: Convert to fraction form
   2,388.78/3,296.67 = 1,393.83/x
3. Step 3: Cross multiply
   2,388.78x = 3,296.67 × 1,393.83
4. Step 4: Simplify right side
   2,388.78x = 4,594,997.55
5. Step 5: Solve for x
   x = 4,594,997.55/2,388.78
6. Step 6: Final answer
   x = 1,923.58