Finding the Fourth Proportional to 2,940.12, 4,409.10 and 859.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.12 : 4,409.10 = 859.59 : x
2. Step 2: Convert to fraction form
   2,940.12/4,409.10 = 859.59/x
3. Step 3: Cross multiply
   2,940.12x = 4,409.10 × 859.59
4. Step 4: Simplify right side
   2,940.12x = 3,790,018.27
5. Step 5: Solve for x
   x = 3,790,018.27/2,940.12
6. Step 6: Final answer
   x = 1,289.07