Finding the Fourth Proportional to 3,320.56, 4,982.22 and 1,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,320.56 : 4,982.22 = 1,128.10 : x
2. Step 2: Convert to fraction form
   3,320.56/4,982.22 = 1,128.10/x
3. Step 3: Cross multiply
   3,320.56x = 4,982.22 × 1,128.10
4. Step 4: Simplify right side
   3,320.56x = 5,620,442.38
5. Step 5: Solve for x
   x = 5,620,442.38/3,320.56
6. Step 6: Final answer
   x = 1,692.62