Finding the Fourth Proportional to 2,241.42, 3,359.76 and 853.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,241.42 : 3,359.76 = 853.86 : x
2. Step 2: Convert to fraction form
   2,241.42/3,359.76 = 853.86/x
3. Step 3: Cross multiply
   2,241.42x = 3,359.76 × 853.86
4. Step 4: Simplify right side
   2,241.42x = 2,868,764.67
5. Step 5: Solve for x
   x = 2,868,764.67/2,241.42
6. Step 6: Final answer
   x = 1,279.89