Finding the Fourth Proportional to 9,668.47, 13,343.56 and 5,420.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,668.47 : 13,343.56 = 5,420.23 : x
2. Step 2: Convert to fraction form
   9,668.47/13,343.56 = 5,420.23/x
3. Step 3: Cross multiply
   9,668.47x = 13,343.56 × 5,420.23
4. Step 4: Simplify right side
   9,668.47x = 72,325,164.22
5. Step 5: Solve for x
   x = 72,325,164.22/9,668.47
6. Step 6: Final answer
   x = 7,480.52