Finding the Fourth Proportional to 2,358.23, 3,254.81 and 1,561.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,358.23 : 3,254.81 = 1,561.57 : x
2. Step 2: Convert to fraction form
   2,358.23/3,254.81 = 1,561.57/x
3. Step 3: Cross multiply
   2,358.23x = 3,254.81 × 1,561.57
4. Step 4: Simplify right side
   2,358.23x = 5,082,609.42
5. Step 5: Solve for x
   x = 5,082,609.42/2,358.23
6. Step 6: Final answer
   x = 2,155.26