Finding the Fourth Proportional to 1,921.01, 2,650.89 and 1,081.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.01 : 2,650.89 = 1,081.85 : x
2. Step 2: Convert to fraction form
   1,921.01/2,650.89 = 1,081.85/x
3. Step 3: Cross multiply
   1,921.01x = 2,650.89 × 1,081.85
4. Step 4: Simplify right side
   1,921.01x = 2,867,865.35
5. Step 5: Solve for x
   x = 2,867,865.35/1,921.01
6. Step 6: Final answer
   x = 1,492.89