Finding the Fourth Proportional to 2,247.82, 3,369.42 and 860.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,247.82 : 3,369.42 = 860.78 : x
2. Step 2: Convert to fraction form
   2,247.82/3,369.42 = 860.78/x
3. Step 3: Cross multiply
   2,247.82x = 3,369.42 × 860.78
4. Step 4: Simplify right side
   2,247.82x = 2,900,329.35
5. Step 5: Solve for x
   x = 2,900,329.35/2,247.82
6. Step 6: Final answer
   x = 1,290.29