Finding the Fourth Proportional to 2,561.27, 3,534.81 and 1,567.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.27 : 3,534.81 = 1,567.21 : x
2. Step 2: Convert to fraction form
   2,561.27/3,534.81 = 1,567.21/x
3. Step 3: Cross multiply
   2,561.27x = 3,534.81 × 1,567.21
4. Step 4: Simplify right side
   2,561.27x = 5,539,789.58
5. Step 5: Solve for x
   x = 5,539,789.58/2,561.27
6. Step 6: Final answer
   x = 2,162.91