Finding the Fourth Proportional to 2,315.98, 3,196.02 and 1,321.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.98 : 3,196.02 = 1,321.57 : x
2. Step 2: Convert to fraction form
   2,315.98/3,196.02 = 1,321.57/x
3. Step 3: Cross multiply
   2,315.98x = 3,196.02 × 1,321.57
4. Step 4: Simplify right side
   2,315.98x = 4,223,764.15
5. Step 5: Solve for x
   x = 4,223,764.15/2,315.98
6. Step 6: Final answer
   x = 1,823.75