Finding the Fourth Proportional to 9,238.25, 12,749.30 and 5,259.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238.25 : 12,749.30 = 5,259.28 : x
2. Step 2: Convert to fraction form
   9,238.25/12,749.30 = 5,259.28/x
3. Step 3: Cross multiply
   9,238.25x = 12,749.30 × 5,259.28
4. Step 4: Simplify right side
   9,238.25x = 67,052,123.96
5. Step 5: Solve for x
   x = 67,052,123.96/9,238.25
6. Step 6: Final answer
   x = 7,258.10