Finding the Fourth Proportional to 3,388.56, 5,082.78 and 1,080

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.56 : 5,082.78 = 1,080 : x
2. Step 2: Convert to fraction form
   3,388.56/5,082.78 = 1,080/x
3. Step 3: Cross multiply
   3,388.56x = 5,082.78 × 1,080
4. Step 4: Simplify right side
   3,388.56x = 5,489,402.40
5. Step 5: Solve for x
   x = 5,489,402.40/3,388.56
6. Step 6: Final answer
   x = 1,619.98