Finding the Fourth Proportional to 2,131.29, 3,196.95 and 814.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.29 : 3,196.95 = 814.74 : x
2. Step 2: Convert to fraction form
   2,131.29/3,196.95 = 814.74/x
3. Step 3: Cross multiply
   2,131.29x = 3,196.95 × 814.74
4. Step 4: Simplify right side
   2,131.29x = 2,604,683.04
5. Step 5: Solve for x
   x = 2,604,683.04/2,131.29
6. Step 6: Final answer
   x = 1,222.12