Finding the Fourth Proportional to 9,768.87, 13,481.71 and 5,518.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.87 : 13,481.71 = 5,518.46 : x
2. Step 2: Convert to fraction form
   9,768.87/13,481.71 = 5,518.46/x
3. Step 3: Cross multiply
   9,768.87x = 13,481.71 × 5,518.46
4. Step 4: Simplify right side
   9,768.87x = 74,398,297.27
5. Step 5: Solve for x
   x = 74,398,297.27/9,768.87
6. Step 6: Final answer
   x = 7,615.85