Finding the Fourth Proportional to 2,922.69, 4,383.55 and 842.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,922.69 : 4,383.55 = 842.61 : x
2. Step 2: Convert to fraction form
   2,922.69/4,383.55 = 842.61/x
3. Step 3: Cross multiply
   2,922.69x = 4,383.55 × 842.61
4. Step 4: Simplify right side
   2,922.69x = 3,693,623.07
5. Step 5: Solve for x
   x = 3,693,623.07/2,922.69
6. Step 6: Final answer
   x = 1,263.78