Finding the Fourth Proportional to 1,920.05, 2,649.56 and 1,080.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.05 : 2,649.56 = 1,080.79 : x
2. Step 2: Convert to fraction form
   1,920.05/2,649.56 = 1,080.79/x
3. Step 3: Cross multiply
   1,920.05x = 2,649.56 × 1,080.79
4. Step 4: Simplify right side
   1,920.05x = 2,863,617.95
5. Step 5: Solve for x
   x = 2,863,617.95/1,920.05
6. Step 6: Final answer
   x = 1,491.43