Finding the Fourth Proportional to 9,615.86, 13,269.86 and 5,424.11

Step by Step Solution

1. Step 1: Write the proportion equation
   9,615.86 : 13,269.86 = 5,424.11 : x
2. Step 2: Convert to fraction form
   9,615.86/13,269.86 = 5,424.11/x
3. Step 3: Cross multiply
   9,615.86x = 13,269.86 × 5,424.11
4. Step 4: Simplify right side
   9,615.86x = 71,977,086.85
5. Step 5: Solve for x
   x = 71,977,086.85/9,615.86
6. Step 6: Final answer
   x = 7,485.25