Finding the Fourth Proportional to 2,856.07, 4,284.71 and 1,007.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.07 : 4,284.71 = 1,007.23 : x
2. Step 2: Convert to fraction form
   2,856.07/4,284.71 = 1,007.23/x
3. Step 3: Cross multiply
   2,856.07x = 4,284.71 × 1,007.23
4. Step 4: Simplify right side
   2,856.07x = 4,315,683.42
5. Step 5: Solve for x
   x = 4,315,683.42/2,856.07
6. Step 6: Final answer
   x = 1,511.06