Finding the Fourth Proportional to 2,383.94, 3,288.26 and 1,388.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,383.94 : 3,288.26 = 1,388.28 : x
2. Step 2: Convert to fraction form
   2,383.94/3,288.26 = 1,388.28/x
3. Step 3: Cross multiply
   2,383.94x = 3,288.26 × 1,388.28
4. Step 4: Simplify right side
   2,383.94x = 4,565,025.59
5. Step 5: Solve for x
   x = 4,565,025.59/2,383.94
6. Step 6: Final answer
   x = 1,914.91