Finding the Fourth Proportional to 3,200.87, 4,800.83 and 1,120.73

Step by Step Solution

1. Step 1: Write the proportion equation
   3,200.87 : 4,800.83 = 1,120.73 : x
2. Step 2: Convert to fraction form
   3,200.87/4,800.83 = 1,120.73/x
3. Step 3: Cross multiply
   3,200.87x = 4,800.83 × 1,120.73
4. Step 4: Simplify right side
   3,200.87x = 5,380,404.60
5. Step 5: Solve for x
   x = 5,380,404.60/3,200.87
6. Step 6: Final answer
   x = 1,680.92