Finding the Fourth Proportional to 2,856.72, 4,285.54 and 1,297.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.72 : 4,285.54 = 1,297.42 : x
2. Step 2: Convert to fraction form
   2,856.72/4,285.54 = 1,297.42/x
3. Step 3: Cross multiply
   2,856.72x = 4,285.54 × 1,297.42
4. Step 4: Simplify right side
   2,856.72x = 5,560,145.31
5. Step 5: Solve for x
   x = 5,560,145.31/2,856.72
6. Step 6: Final answer
   x = 1,946.34