Finding the Fourth Proportional to 2,853.37, 4,279.82 and 1,121.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.37 : 4,279.82 = 1,121.99 : x
2. Step 2: Convert to fraction form
   2,853.37/4,279.82 = 1,121.99/x
3. Step 3: Cross multiply
   2,853.37x = 4,279.82 × 1,121.99
4. Step 4: Simplify right side
   2,853.37x = 4,801,920.33
5. Step 5: Solve for x
   x = 4,801,920.33/2,853.37
6. Step 6: Final answer
   x = 1,682.90