Finding the Fourth Proportional to 2,555.25, 3,526.65 and 1,561.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.25 : 3,526.65 = 1,561.11 : x
2. Step 2: Convert to fraction form
   2,555.25/3,526.65 = 1,561.11/x
3. Step 3: Cross multiply
   2,555.25x = 3,526.65 × 1,561.11
4. Step 4: Simplify right side
   2,555.25x = 5,505,488.58
5. Step 5: Solve for x
   x = 5,505,488.58/2,555.25
6. Step 6: Final answer
   x = 2,154.58