Finding the Fourth Proportional to 2,856.78, 4,283.96 and 1,007.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.78 : 4,283.96 = 1,007.46 : x
2. Step 2: Convert to fraction form
   2,856.78/4,283.96 = 1,007.46/x
3. Step 3: Cross multiply
   2,856.78x = 4,283.96 × 1,007.46
4. Step 4: Simplify right side
   2,856.78x = 4,315,918.34
5. Step 5: Solve for x
   x = 4,315,918.34/2,856.78
6. Step 6: Final answer
   x = 1,510.76