Finding the Fourth Proportional to 1,154.52, 1,720.17 and 1,080

Step by Step Solution

1. Step 1: Write the proportion equation
   1,154.52 : 1,720.17 = 1,080 : x
2. Step 2: Convert to fraction form
   1,154.52/1,720.17 = 1,080/x
3. Step 3: Cross multiply
   1,154.52x = 1,720.17 × 1,080
4. Step 4: Simplify right side
   1,154.52x = 1,857,783.60
5. Step 5: Solve for x
   x = 1,857,783.60/1,154.52
6. Step 6: Final answer
   x = 1,609.14