Finding the Fourth Proportional to 9,027.72, 12,458.28 and 5,253.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,027.72 : 12,458.28 = 5,253.12 : x
2. Step 2: Convert to fraction form
   9,027.72/12,458.28 = 5,253.12/x
3. Step 3: Cross multiply
   9,027.72x = 12,458.28 × 5,253.12
4. Step 4: Simplify right side
   9,027.72x = 65,444,839.83
5. Step 5: Solve for x
   x = 65,444,839.83/9,027.72
6. Step 6: Final answer
   x = 7,249.32