Finding the Fourth Proportional to 2,120.71, 3,183.01 and 1,081.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.71 : 3,183.01 = 1,081.46 : x
2. Step 2: Convert to fraction form
   2,120.71/3,183.01 = 1,081.46/x
3. Step 3: Cross multiply
   2,120.71x = 3,183.01 × 1,081.46
4. Step 4: Simplify right side
   2,120.71x = 3,442,291.31
5. Step 5: Solve for x
   x = 3,442,291.31/2,120.71
6. Step 6: Final answer
   x = 1,623.18