Finding the Fourth Proportional to 2,555.15, 3,526.49 and 1,561.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.15 : 3,526.49 = 1,561.01 : x
2. Step 2: Convert to fraction form
   2,555.15/3,526.49 = 1,561.01/x
3. Step 3: Cross multiply
   2,555.15x = 3,526.49 × 1,561.01
4. Step 4: Simplify right side
   2,555.15x = 5,504,872.42
5. Step 5: Solve for x
   x = 5,504,872.42/2,555.15
6. Step 6: Final answer
   x = 2,154.42