Finding the Fourth Proportional to 9,282.17, 12,738.37 and 9,216.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,282.17 : 12,738.37 = 9,216.56 : x
2. Step 2: Convert to fraction form
   9,282.17/12,738.37 = 9,216.56/x
3. Step 3: Cross multiply
   9,282.17x = 12,738.37 × 9,216.56
4. Step 4: Simplify right side
   9,282.17x = 117,403,951.41
5. Step 5: Solve for x
   x = 117,403,951.41/9,282.17
6. Step 6: Final answer
   x = 12,648.33