Finding the Fourth Proportional to 3,200.72, 4,800.83 and 1,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,200.72 : 4,800.83 = 1,120.50 : x
2. Step 2: Convert to fraction form
   3,200.72/4,800.83 = 1,120.50/x
3. Step 3: Cross multiply
   3,200.72x = 4,800.83 × 1,120.50
4. Step 4: Simplify right side
   3,200.72x = 5,379,342.42
5. Step 5: Solve for x
   x = 5,379,342.42/3,200.72
6. Step 6: Final answer
   x = 1,680.67