Finding the Fourth Proportional to 2,609.82, 3,600.05 and 1,561.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.82 : 3,600.05 = 1,561.28 : x
2. Step 2: Convert to fraction form
   2,609.82/3,600.05 = 1,561.28/x
3. Step 3: Cross multiply
   2,609.82x = 3,600.05 × 1,561.28
4. Step 4: Simplify right side
   2,609.82x = 5,620,660.26
5. Step 5: Solve for x
   x = 5,620,660.26/2,609.82
6. Step 6: Final answer
   x = 2,153.66