Finding the Fourth Proportional to 9,399.54, 12,969.21 and 5,622.11

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.54 : 12,969.21 = 5,622.11 : x
2. Step 2: Convert to fraction form
   9,399.54/12,969.21 = 5,622.11/x
3. Step 3: Cross multiply
   9,399.54x = 12,969.21 × 5,622.11
4. Step 4: Simplify right side
   9,399.54x = 72,914,330.10
5. Step 5: Solve for x
   x = 72,914,330.10/9,399.54
6. Step 6: Final answer
   x = 7,757.22