Finding the Fourth Proportional to 9,644.50, 13,309.42 and 5,228.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,644.50 : 13,309.42 = 5,228.50 : x
2. Step 2: Convert to fraction form
   9,644.50/13,309.42 = 5,228.50/x
3. Step 3: Cross multiply
   9,644.50x = 13,309.42 × 5,228.50
4. Step 4: Simplify right side
   9,644.50x = 69,588,302.47
5. Step 5: Solve for x
   x = 69,588,302.47/9,644.50
6. Step 6: Final answer
   x = 7,215.34