Finding the Fourth Proportional to 1,281.98, 1,922.55 and 550.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.98 : 1,922.55 = 550.82 : x
2. Step 2: Convert to fraction form
   1,281.98/1,922.55 = 550.82/x
3. Step 3: Cross multiply
   1,281.98x = 1,922.55 × 550.82
4. Step 4: Simplify right side
   1,281.98x = 1,058,978.99
5. Step 5: Solve for x
   x = 1,058,978.99/1,281.98
6. Step 6: Final answer
   x = 826.05