Finding the Fourth Proportional to 2,855.10, 4,283.86 and 1,007.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,855.10 : 4,283.86 = 1,007.22 : x
2. Step 2: Convert to fraction form
   2,855.10/4,283.86 = 1,007.22/x
3. Step 3: Cross multiply
   2,855.10x = 4,283.86 × 1,007.22
4. Step 4: Simplify right side
   2,855.10x = 4,314,789.47
5. Step 5: Solve for x
   x = 4,314,789.47/2,855.10
6. Step 6: Final answer
   x = 1,511.26