Finding the Fourth Proportional to 9,615.70, 13,269.72 and 5,424.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,615.70 : 13,269.72 = 5,424.22 : x
2. Step 2: Convert to fraction form
   9,615.70/13,269.72 = 5,424.22/x
3. Step 3: Cross multiply
   9,615.70x = 13,269.72 × 5,424.22
4. Step 4: Simplify right side
   9,615.70x = 71,977,880.62
5. Step 5: Solve for x
   x = 71,977,880.62/9,615.70
6. Step 6: Final answer
   x = 7,485.45