Finding the Fourth Proportional to 2,120.33, 3,179.50 and 1,080.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.33 : 3,179.50 = 1,080.89 : x
2. Step 2: Convert to fraction form
   2,120.33/3,179.50 = 1,080.89/x
3. Step 3: Cross multiply
   2,120.33x = 3,179.50 × 1,080.89
4. Step 4: Simplify right side
   2,120.33x = 3,436,707.04
5. Step 5: Solve for x
   x = 3,436,707.04/2,120.33
6. Step 6: Final answer
   x = 1,620.84