Finding the Fourth Proportional to 2,131.98, 3,198.42 and 833.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.98 : 3,198.42 = 833.55 : x
2. Step 2: Convert to fraction form
   2,131.98/3,198.42 = 833.55/x
3. Step 3: Cross multiply
   2,131.98x = 3,198.42 × 833.55
4. Step 4: Simplify right side
   2,131.98x = 2,666,042.99
5. Step 5: Solve for x
   x = 2,666,042.99/2,131.98
6. Step 6: Final answer
   x = 1,250.50