Finding the Fourth Proportional to 1,080.24, 1,491.40 and 744.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.24 : 1,491.40 = 744.72 : x
2. Step 2: Convert to fraction form
   1,080.24/1,491.40 = 744.72/x
3. Step 3: Cross multiply
   1,080.24x = 1,491.40 × 744.72
4. Step 4: Simplify right side
   1,080.24x = 1,110,675.41
5. Step 5: Solve for x
   x = 1,110,675.41/1,080.24
6. Step 6: Final answer
   x = 1,028.17