Finding the Fourth Proportional to 2,315.13, 3,196.34 and 1,431.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.13 : 3,196.34 = 1,431.43 : x
2. Step 2: Convert to fraction form
   2,315.13/3,196.34 = 1,431.43/x
3. Step 3: Cross multiply
   2,315.13x = 3,196.34 × 1,431.43
4. Step 4: Simplify right side
   2,315.13x = 4,575,336.97
5. Step 5: Solve for x
   x = 4,575,336.97/2,315.13
6. Step 6: Final answer
   x = 1,976.28