Finding the Fourth Proportional to 9,238.20, 12,745.98 and 5,259.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238.20 : 12,745.98 = 5,259.30 : x
2. Step 2: Convert to fraction form
   9,238.20/12,745.98 = 5,259.30/x
3. Step 3: Cross multiply
   9,238.20x = 12,745.98 × 5,259.30
4. Step 4: Simplify right side
   9,238.20x = 67,034,932.61
5. Step 5: Solve for x
   x = 67,034,932.61/9,238.20
6. Step 6: Final answer
   x = 7,256.28