Finding the Fourth Proportional to 3,320.41, 4,980.31 and 1,128.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,320.41 : 4,980.31 = 1,128.89 : x
2. Step 2: Convert to fraction form
   3,320.41/4,980.31 = 1,128.89/x
3. Step 3: Cross multiply
   3,320.41x = 4,980.31 × 1,128.89
4. Step 4: Simplify right side
   3,320.41x = 5,622,194.43
5. Step 5: Solve for x
   x = 5,622,194.43/3,320.41
6. Step 6: Final answer
   x = 1,693.22