Finding the Fourth Proportional to 2,556.26, 3,527.72 and 1,561.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.26 : 3,527.72 = 1,561.98 : x
2. Step 2: Convert to fraction form
   2,556.26/3,527.72 = 1,561.98/x
3. Step 3: Cross multiply
   2,556.26x = 3,527.72 × 1,561.98
4. Step 4: Simplify right side
   2,556.26x = 5,510,220.28
5. Step 5: Solve for x
   x = 5,510,220.28/2,556.26
6. Step 6: Final answer
   x = 2,155.58