Finding the Fourth Proportional to 9,225.26, 12,729.72 and 5,191.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,225.26 : 12,729.72 = 5,191.59 : x
2. Step 2: Convert to fraction form
   9,225.26/12,729.72 = 5,191.59/x
3. Step 3: Cross multiply
   9,225.26x = 12,729.72 × 5,191.59
4. Step 4: Simplify right side
   9,225.26x = 66,087,487.05
5. Step 5: Solve for x
   x = 66,087,487.05/9,225.26
6. Step 6: Final answer
   x = 7,163.75