Finding the Fourth Proportional to 9,769.87, 13,481.61 and 5,521.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,769.87 : 13,481.61 = 5,521.29 : x
2. Step 2: Convert to fraction form
   9,769.87/13,481.61 = 5,521.29/x
3. Step 3: Cross multiply
   9,769.87x = 13,481.61 × 5,521.29
4. Step 4: Simplify right side
   9,769.87x = 74,435,891.72
5. Step 5: Solve for x
   x = 74,435,891.72/9,769.87
6. Step 6: Final answer
   x = 7,618.93