Finding the Fourth Proportional to 9,400.05, 12,974.40 and 5,423.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.05 : 12,974.40 = 5,423.54 : x
2. Step 2: Convert to fraction form
   9,400.05/12,974.40 = 5,423.54/x
3. Step 3: Cross multiply
   9,400.05x = 12,974.40 × 5,423.54
4. Step 4: Simplify right side
   9,400.05x = 70,367,112.50
5. Step 5: Solve for x
   x = 70,367,112.50/9,400.05
6. Step 6: Final answer
   x = 7,485.82