Finding the Fourth Proportional to 5,518.82, 7,615.89 and 3,281.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,518.82 : 7,615.89 = 3,281.78 : x
2. Step 2: Convert to fraction form
   5,518.82/7,615.89 = 3,281.78/x
3. Step 3: Cross multiply
   5,518.82x = 7,615.89 × 3,281.78
4. Step 4: Simplify right side
   5,518.82x = 24,993,675.48
5. Step 5: Solve for x
   x = 24,993,675.48/5,518.82
6. Step 6: Final answer
   x = 4,528.81