Finding the Fourth Proportional to 2,384.43, 3,289.72 and 1,439.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.43 : 3,289.72 = 1,439.86 : x
2. Step 2: Convert to fraction form
   2,384.43/3,289.72 = 1,439.86/x
3. Step 3: Cross multiply
   2,384.43x = 3,289.72 × 1,439.86
4. Step 4: Simplify right side
   2,384.43x = 4,736,736.24
5. Step 5: Solve for x
   x = 4,736,736.24/2,384.43
6. Step 6: Final answer
   x = 1,986.53