Finding the Fourth Proportional to 3,200.91, 4,801.11 and 1,120.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,200.91 : 4,801.11 = 1,120.69 : x
2. Step 2: Convert to fraction form
   3,200.91/4,801.11 = 1,120.69/x
3. Step 3: Cross multiply
   3,200.91x = 4,801.11 × 1,120.69
4. Step 4: Simplify right side
   3,200.91x = 5,380,557.76
5. Step 5: Solve for x
   x = 5,380,557.76/3,200.91
6. Step 6: Final answer
   x = 1,680.95