Finding the Fourth Proportional to 2,143.98, 3,217.23 and 845.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.98 : 3,217.23 = 845.82 : x
2. Step 2: Convert to fraction form
   2,143.98/3,217.23 = 845.82/x
3. Step 3: Cross multiply
   2,143.98x = 3,217.23 × 845.82
4. Step 4: Simplify right side
   2,143.98x = 2,721,197.48
5. Step 5: Solve for x
   x = 2,721,197.48/2,143.98
6. Step 6: Final answer
   x = 1,269.23