Finding the Fourth Proportional to 9,399.51, 12,974.18 and 5,423.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.51 : 12,974.18 = 5,423.22 : x
2. Step 2: Convert to fraction form
   9,399.51/12,974.18 = 5,423.22/x
3. Step 3: Cross multiply
   9,399.51x = 12,974.18 × 5,423.22
4. Step 4: Simplify right side
   9,399.51x = 70,361,805.34
5. Step 5: Solve for x
   x = 70,361,805.34/9,399.51
6. Step 6: Final answer
   x = 7,485.69