Finding the Fourth Proportional to 9,415.29, 12,993.24 and 5,223.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.29 : 12,993.24 = 5,223.54 : x
2. Step 2: Convert to fraction form
   9,415.29/12,993.24 = 5,223.54/x
3. Step 3: Cross multiply
   9,415.29x = 12,993.24 × 5,223.54
4. Step 4: Simplify right side
   9,415.29x = 67,870,708.87
5. Step 5: Solve for x
   x = 67,870,708.87/9,415.29
6. Step 6: Final answer
   x = 7,208.56