Finding the Fourth Proportional to 2,123.20, 3,179.67 and 1,080.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.20 : 3,179.67 = 1,080.46 : x
2. Step 2: Convert to fraction form
   2,123.20/3,179.67 = 1,080.46/x
3. Step 3: Cross multiply
   2,123.20x = 3,179.67 × 1,080.46
4. Step 4: Simplify right side
   2,123.20x = 3,435,506.25
5. Step 5: Solve for x
   x = 3,435,506.25/2,123.20
6. Step 6: Final answer
   x = 1,618.08