Finding the Fourth Proportional to 2,650.41, 3,976.89 and 1,091.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.41 : 3,976.89 = 1,091.55 : x
2. Step 2: Convert to fraction form
   2,650.41/3,976.89 = 1,091.55/x
3. Step 3: Cross multiply
   2,650.41x = 3,976.89 × 1,091.55
4. Step 4: Simplify right side
   2,650.41x = 4,340,974.28
5. Step 5: Solve for x
   x = 4,340,974.28/2,650.41
6. Step 6: Final answer
   x = 1,637.85