Finding the Fourth Proportional to 9,415.26, 12,993.52 and 5,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.26 : 12,993.52 = 5,223.50 : x
2. Step 2: Convert to fraction form
   9,415.26/12,993.52 = 5,223.50/x
3. Step 3: Cross multiply
   9,415.26x = 12,993.52 × 5,223.50
4. Step 4: Simplify right side
   9,415.26x = 67,871,651.72
5. Step 5: Solve for x
   x = 67,871,651.72/9,415.26
6. Step 6: Final answer
   x = 7,208.69