Finding the Fourth Proportional to 2,315.60, 3,195.76 and 1,571.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.60 : 3,195.76 = 1,571.12 : x
2. Step 2: Convert to fraction form
   2,315.60/3,195.76 = 1,571.12/x
3. Step 3: Cross multiply
   2,315.60x = 3,195.76 × 1,571.12
4. Step 4: Simplify right side
   2,315.60x = 5,020,922.45
5. Step 5: Solve for x
   x = 5,020,922.45/2,315.60
6. Step 6: Final answer
   x = 2,168.30