Finding the Fourth Proportional to 9,518.66, 13,138.39 and 5,540.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,518.66 : 13,138.39 = 5,540.54 : x
2. Step 2: Convert to fraction form
   9,518.66/13,138.39 = 5,540.54/x
3. Step 3: Cross multiply
   9,518.66x = 13,138.39 × 5,540.54
4. Step 4: Simplify right side
   9,518.66x = 72,793,775.33
5. Step 5: Solve for x
   x = 72,793,775.33/9,518.66
6. Step 6: Final answer
   x = 7,647.48