Finding the Fourth Proportional to 2,383.08, 3,288.72 and 1,665.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,383.08 : 3,288.72 = 1,665.40 : x
2. Step 2: Convert to fraction form
   2,383.08/3,288.72 = 1,665.40/x
3. Step 3: Cross multiply
   2,383.08x = 3,288.72 × 1,665.40
4. Step 4: Simplify right side
   2,383.08x = 5,477,034.29
5. Step 5: Solve for x
   x = 5,477,034.29/2,383.08
6. Step 6: Final answer
   x = 2,298.30