Finding the Fourth Proportional to 2,383.59, 3,289.46 and 1,388.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,383.59 : 3,289.46 = 1,388.96 : x
2. Step 2: Convert to fraction form
   2,383.59/3,289.46 = 1,388.96/x
3. Step 3: Cross multiply
   2,383.59x = 3,289.46 × 1,388.96
4. Step 4: Simplify right side
   2,383.59x = 4,568,917.30
5. Step 5: Solve for x
   x = 4,568,917.30/2,383.59
6. Step 6: Final answer
   x = 1,916.82