Finding the Fourth Proportional to 2,581.80, 3,561.40 and 1,586.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.80 : 3,561.40 = 1,586.37 : x
2. Step 2: Convert to fraction form
   2,581.80/3,561.40 = 1,586.37/x
3. Step 3: Cross multiply
   2,581.80x = 3,561.40 × 1,586.37
4. Step 4: Simplify right side
   2,581.80x = 5,649,698.12
5. Step 5: Solve for x
   x = 5,649,698.12/2,581.80
6. Step 6: Final answer
   x = 2,188.28