Finding the Fourth Proportional to 2,315.93, 3,196.46 and 1,431.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.93 : 3,196.46 = 1,431.56 : x
2. Step 2: Convert to fraction form
   2,315.93/3,196.46 = 1,431.56/x
3. Step 3: Cross multiply
   2,315.93x = 3,196.46 × 1,431.56
4. Step 4: Simplify right side
   2,315.93x = 4,575,901.14
5. Step 5: Solve for x
   x = 4,575,901.14/2,315.93
6. Step 6: Final answer
   x = 1,975.84