Finding the Fourth Proportional to 3,196.48, 4,411.56 and 2,315.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,196.48 : 4,411.56 = 2,315.20 : x
2. Step 2: Convert to fraction form
   3,196.48/4,411.56 = 2,315.20/x
3. Step 3: Cross multiply
   3,196.48x = 4,411.56 × 2,315.20
4. Step 4: Simplify right side
   3,196.48x = 10,213,643.71
5. Step 5: Solve for x
   x = 10,213,643.71/3,196.48
6. Step 6: Final answer
   x = 3,195.28