Finding the Fourth Proportional to 2,940.24, 4,410.27 and 860.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.24 : 4,410.27 = 860.34 : x
2. Step 2: Convert to fraction form
   2,940.24/4,410.27 = 860.34/x
3. Step 3: Cross multiply
   2,940.24x = 4,410.27 × 860.34
4. Step 4: Simplify right side
   2,940.24x = 3,794,331.69
5. Step 5: Solve for x
   x = 3,794,331.69/2,940.24
6. Step 6: Final answer
   x = 1,290.48