Finding the Fourth Proportional to 1,920.38, 2,649.96 and 1,080.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.38 : 2,649.96 = 1,080.81 : x
2. Step 2: Convert to fraction form
   1,920.38/2,649.96 = 1,080.81/x
3. Step 3: Cross multiply
   1,920.38x = 2,649.96 × 1,080.81
4. Step 4: Simplify right side
   1,920.38x = 2,864,103.27
5. Step 5: Solve for x
   x = 2,864,103.27/1,920.38
6. Step 6: Final answer
   x = 1,491.43