Finding the Fourth Proportional to 2,561.67, 3,843.57 and 1,081.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.67 : 3,843.57 = 1,081.26 : x
2. Step 2: Convert to fraction form
   2,561.67/3,843.57 = 1,081.26/x
3. Step 3: Cross multiply
   2,561.67x = 3,843.57 × 1,081.26
4. Step 4: Simplify right side
   2,561.67x = 4,155,898.50
5. Step 5: Solve for x
   x = 4,155,898.50/2,561.67
6. Step 6: Final answer
   x = 1,622.34