Finding the Fourth Proportional to 2,196.84, 3,031.92 and 1,313.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.84 : 3,031.92 = 1,313.16 : x
2. Step 2: Convert to fraction form
   2,196.84/3,031.92 = 1,313.16/x
3. Step 3: Cross multiply
   2,196.84x = 3,031.92 × 1,313.16
4. Step 4: Simplify right side
   2,196.84x = 3,981,396.07
5. Step 5: Solve for x
   x = 3,981,396.07/2,196.84
6. Step 6: Final answer
   x = 1,812.33