Finding the Fourth Proportional to 2,196.89, 3,031.61 and 1,313.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.89 : 3,031.61 = 1,313.18 : x
2. Step 2: Convert to fraction form
   2,196.89/3,031.61 = 1,313.18/x
3. Step 3: Cross multiply
   2,196.89x = 3,031.61 × 1,313.18
4. Step 4: Simplify right side
   2,196.89x = 3,981,034.46
5. Step 5: Solve for x
   x = 3,981,034.46/2,196.89
6. Step 6: Final answer
   x = 1,812.13