Finding the Fourth Proportional to 2,388.86, 3,296.02 and 1,393.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.86 : 3,296.02 = 1,393.78 : x
2. Step 2: Convert to fraction form
   2,388.86/3,296.02 = 1,393.78/x
3. Step 3: Cross multiply
   2,388.86x = 3,296.02 × 1,393.78
4. Step 4: Simplify right side
   2,388.86x = 4,593,926.76
5. Step 5: Solve for x
   x = 4,593,926.76/2,388.86
6. Step 6: Final answer
   x = 1,923.06