Finding the Fourth Proportional to 9,224.56, 12,729.52 and 5,191.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,224.56 : 12,729.52 = 5,191.30 : x
2. Step 2: Convert to fraction form
   9,224.56/12,729.52 = 5,191.30/x
3. Step 3: Cross multiply
   9,224.56x = 12,729.52 × 5,191.30
4. Step 4: Simplify right side
   9,224.56x = 66,082,757.18
5. Step 5: Solve for x
   x = 66,082,757.18/9,224.56
6. Step 6: Final answer
   x = 7,163.78