Finding the Fourth Proportional to 9,215.42, 12,717.72 and 5,183.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,215.42 : 12,717.72 = 5,183.51 : x
2. Step 2: Convert to fraction form
   9,215.42/12,717.72 = 5,183.51/x
3. Step 3: Cross multiply
   9,215.42x = 12,717.72 × 5,183.51
4. Step 4: Simplify right side
   9,215.42x = 65,922,428.80
5. Step 5: Solve for x
   x = 65,922,428.80/9,215.42
6. Step 6: Final answer
   x = 7,153.49