Finding the Fourth Proportional to 13,630.73, 20,453.85 and 5,309.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,630.73 : 20,453.85 = 5,309.69 : x
2. Step 2: Convert to fraction form
   13,630.73/20,453.85 = 5,309.69/x
3. Step 3: Cross multiply
   13,630.73x = 20,453.85 × 5,309.69
4. Step 4: Simplify right side
   13,630.73x = 108,603,500.54
5. Step 5: Solve for x
   x = 108,603,500.54/13,630.73
6. Step 6: Final answer
   x = 7,967.55