Finding the Fourth Proportional to 2,131.31, 3,198.49 and 833.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.31 : 3,198.49 = 833.09 : x
2. Step 2: Convert to fraction form
   2,131.31/3,198.49 = 833.09/x
3. Step 3: Cross multiply
   2,131.31x = 3,198.49 × 833.09
4. Step 4: Simplify right side
   2,131.31x = 2,664,611.96
5. Step 5: Solve for x
   x = 2,664,611.96/2,131.31
6. Step 6: Final answer
   x = 1,250.22