Finding the Fourth Proportional to 9,766.14, 13,478.58 and 5,518.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,766.14 : 13,478.58 = 5,518.08 : x
2. Step 2: Convert to fraction form
   9,766.14/13,478.58 = 5,518.08/x
3. Step 3: Cross multiply
   9,766.14x = 13,478.58 × 5,518.08
4. Step 4: Simplify right side
   9,766.14x = 74,375,882.73
5. Step 5: Solve for x
   x = 74,375,882.73/9,766.14
6. Step 6: Final answer
   x = 7,615.69