Finding the Fourth Proportional to 2,196.38, 3,289.76 and 1,581.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.38 : 3,289.76 = 1,581.28 : x
2. Step 2: Convert to fraction form
   2,196.38/3,289.76 = 1,581.28/x
3. Step 3: Cross multiply
   2,196.38x = 3,289.76 × 1,581.28
4. Step 4: Simplify right side
   2,196.38x = 5,202,031.69
5. Step 5: Solve for x
   x = 5,202,031.69/2,196.38
6. Step 6: Final answer
   x = 2,368.46