Finding the Fourth Proportional to 2,581.50, 3,559.14 and 2,108.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.50 : 3,559.14 = 2,108.90 : x
2. Step 2: Convert to fraction form
   2,581.50/3,559.14 = 2,108.90/x
3. Step 3: Cross multiply
   2,581.50x = 3,559.14 × 2,108.90
4. Step 4: Simplify right side
   2,581.50x = 7,505,870.35
5. Step 5: Solve for x
   x = 7,505,870.35/2,581.50
6. Step 6: Final answer
   x = 2,907.56