Finding the Fourth Proportional to 2,384.08, 3,289.39 and 1,638.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.08 : 3,289.39 = 1,638.30 : x
2. Step 2: Convert to fraction form
   2,384.08/3,289.39 = 1,638.30/x
3. Step 3: Cross multiply
   2,384.08x = 3,289.39 × 1,638.30
4. Step 4: Simplify right side
   2,384.08x = 5,389,007.64
5. Step 5: Solve for x
   x = 5,389,007.64/2,384.08
6. Step 6: Final answer
   x = 2,260.41