Finding the Fourth Proportional to 2,131.15, 3,196.23 and 814.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.15 : 3,196.23 = 814.43 : x
2. Step 2: Convert to fraction form
   2,131.15/3,196.23 = 814.43/x
3. Step 3: Cross multiply
   2,131.15x = 3,196.23 × 814.43
4. Step 4: Simplify right side
   2,131.15x = 2,603,105.60
5. Step 5: Solve for x
   x = 2,603,105.60/2,131.15
6. Step 6: Final answer
   x = 1,221.46