Finding the Fourth Proportional to 2,581.94, 3,563.15 and 1,587.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.94 : 3,563.15 = 1,587.80 : x
2. Step 2: Convert to fraction form
   2,581.94/3,563.15 = 1,587.80/x
3. Step 3: Cross multiply
   2,581.94x = 3,563.15 × 1,587.80
4. Step 4: Simplify right side
   2,581.94x = 5,657,543.82
5. Step 5: Solve for x
   x = 5,657,543.82/2,581.94
6. Step 6: Final answer
   x = 2,191.20