Finding the Fourth Proportional to 9,768.81, 13,481.24 and 5,520.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.81 : 13,481.24 = 5,520.05 : x
2. Step 2: Convert to fraction form
   9,768.81/13,481.24 = 5,520.05/x
3. Step 3: Cross multiply
   9,768.81x = 13,481.24 × 5,520.05
4. Step 4: Simplify right side
   9,768.81x = 74,417,138.76
5. Step 5: Solve for x
   x = 74,417,138.76/9,768.81
6. Step 6: Final answer
   x = 7,617.83