Finding the Fourth Proportional to 1,920.93, 2,650.89 and 1,081.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.93 : 2,650.89 = 1,081.68 : x
2. Step 2: Convert to fraction form
   1,920.93/2,650.89 = 1,081.68/x
3. Step 3: Cross multiply
   1,920.93x = 2,650.89 × 1,081.68
4. Step 4: Simplify right side
   1,920.93x = 2,867,414.70
5. Step 5: Solve for x
   x = 2,867,414.70/1,920.93
6. Step 6: Final answer
   x = 1,492.72