Finding the Fourth Proportional to 2,315.86, 3,196.07 and 1,321.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.86 : 3,196.07 = 1,321.44 : x
2. Step 2: Convert to fraction form
   2,315.86/3,196.07 = 1,321.44/x
3. Step 3: Cross multiply
   2,315.86x = 3,196.07 × 1,321.44
4. Step 4: Simplify right side
   2,315.86x = 4,223,401.10
5. Step 5: Solve for x
   x = 4,223,401.10/2,315.86
6. Step 6: Final answer
   x = 1,823.68