Finding the Fourth Proportional to 1,920.46, 2,649.89 and 1,081.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.46 : 2,649.89 = 1,081.18 : x
2. Step 2: Convert to fraction form
   1,920.46/2,649.89 = 1,081.18/x
3. Step 3: Cross multiply
   1,920.46x = 2,649.89 × 1,081.18
4. Step 4: Simplify right side
   1,920.46x = 2,865,008.07
5. Step 5: Solve for x
   x = 2,865,008.07/1,920.46
6. Step 6: Final answer
   x = 1,491.83