Finding the Fourth Proportional to 2,241.30, 3,360.78 and 853.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,241.30 : 3,360.78 = 853.56 : x
2. Step 2: Convert to fraction form
   2,241.30/3,360.78 = 853.56/x
3. Step 3: Cross multiply
   2,241.30x = 3,360.78 × 853.56
4. Step 4: Simplify right side
   2,241.30x = 2,868,627.38
5. Step 5: Solve for x
   x = 2,868,627.38/2,241.30
6. Step 6: Final answer
   x = 1,279.89