Finding the Fourth Proportional to 2,384.55, 3,289.83 and 1,439.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.55 : 3,289.83 = 1,439.64 : x
2. Step 2: Convert to fraction form
   2,384.55/3,289.83 = 1,439.64/x
3. Step 3: Cross multiply
   2,384.55x = 3,289.83 × 1,439.64
4. Step 4: Simplify right side
   2,384.55x = 4,736,170.86
5. Step 5: Solve for x
   x = 4,736,170.86/2,384.55
6. Step 6: Final answer
   x = 1,986.19