Finding the Fourth Proportional to 9,581.21, 13,222.17 and 5,389.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,581.21 : 13,222.17 = 5,389.46 : x
2. Step 2: Convert to fraction form
   9,581.21/13,222.17 = 5,389.46/x
3. Step 3: Cross multiply
   9,581.21x = 13,222.17 × 5,389.46
4. Step 4: Simplify right side
   9,581.21x = 71,260,290.22
5. Step 5: Solve for x
   x = 71,260,290.22/9,581.21
6. Step 6: Final answer
   x = 7,437.51