Finding the Fourth Proportional to 2,383.58, 3,289.25 and 1,388.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,383.58 : 3,289.25 = 1,388.93 : x
2. Step 2: Convert to fraction form
   2,383.58/3,289.25 = 1,388.93/x
3. Step 3: Cross multiply
   2,383.58x = 3,289.25 × 1,388.93
4. Step 4: Simplify right side
   2,383.58x = 4,568,514.61
5. Step 5: Solve for x
   x = 4,568,514.61/2,383.58
6. Step 6: Final answer
   x = 1,916.66