Finding the Fourth Proportional to 2,140.98, 3,212.73 and 842.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.98 : 3,212.73 = 842.82 : x
2. Step 2: Convert to fraction form
   2,140.98/3,212.73 = 842.82/x
3. Step 3: Cross multiply
   2,140.98x = 3,212.73 × 842.82
4. Step 4: Simplify right side
   2,140.98x = 2,707,753.10
5. Step 5: Solve for x
   x = 2,707,753.10/2,140.98
6. Step 6: Final answer
   x = 1,264.73