Finding the Fourth Proportional to 2,196.79, 3,031.94 and 1,313.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.79 : 3,031.94 = 1,313.08 : x
2. Step 2: Convert to fraction form
   2,196.79/3,031.94 = 1,313.08/x
3. Step 3: Cross multiply
   2,196.79x = 3,031.94 × 1,313.08
4. Step 4: Simplify right side
   2,196.79x = 3,981,175.48
5. Step 5: Solve for x
   x = 3,981,175.48/2,196.79
6. Step 6: Final answer
   x = 1,812.27