Finding the Fourth Proportional to 2,383.21, 3,288.53 and 1,388.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,383.21 : 3,288.53 = 1,388.24 : x
2. Step 2: Convert to fraction form
   2,383.21/3,288.53 = 1,388.24/x
3. Step 3: Cross multiply
   2,383.21x = 3,288.53 × 1,388.24
4. Step 4: Simplify right side
   2,383.21x = 4,565,268.89
5. Step 5: Solve for x
   x = 4,565,268.89/2,383.21
6. Step 6: Final answer
   x = 1,915.60