Finding the Fourth Proportional to 12,648.48, 17,449.48 and 9,285.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.48 : 17,449.48 = 9,285.48 : x
2. Step 2: Convert to fraction form
   12,648.48/17,449.48 = 9,285.48/x
3. Step 3: Cross multiply
   12,648.48x = 17,449.48 × 9,285.48
4. Step 4: Simplify right side
   12,648.48x = 162,026,797.55
5. Step 5: Solve for x
   x = 162,026,797.55/12,648.48
6. Step 6: Final answer
   x = 12,809.98