Finding the Fourth Proportional to 9,668.37, 13,343.28 and 5,420.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,668.37 : 13,343.28 = 5,420.15 : x
2. Step 2: Convert to fraction form
   9,668.37/13,343.28 = 5,420.15/x
3. Step 3: Cross multiply
   9,668.37x = 13,343.28 × 5,420.15
4. Step 4: Simplify right side
   9,668.37x = 72,322,579.09
5. Step 5: Solve for x
   x = 72,322,579.09/9,668.37
6. Step 6: Final answer
   x = 7,480.33