Finding the Fourth Proportional to 2,856.28, 4,284.69 and 1,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.28 : 4,284.69 = 1,124.50 : x
2. Step 2: Convert to fraction form
   2,856.28/4,284.69 = 1,124.50/x
3. Step 3: Cross multiply
   2,856.28x = 4,284.69 × 1,124.50
4. Step 4: Simplify right side
   2,856.28x = 4,818,133.91
5. Step 5: Solve for x
   x = 4,818,133.91/2,856.28
6. Step 6: Final answer
   x = 1,686.86