Finding the Fourth Proportional to 9,581.69, 13,222.61 and 5,389.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,581.69 : 13,222.61 = 5,389.94 : x
2. Step 2: Convert to fraction form
   9,581.69/13,222.61 = 5,389.94/x
3. Step 3: Cross multiply
   9,581.69x = 13,222.61 × 5,389.94
4. Step 4: Simplify right side
   9,581.69x = 71,269,074.54
5. Step 5: Solve for x
   x = 71,269,074.54/9,581.69
6. Step 6: Final answer
   x = 7,438.05