Finding the Fourth Proportional to 12,443.51, 18,665.81 and 5,786.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.51 : 18,665.81 = 5,786.26 : x
2. Step 2: Convert to fraction form
   12,443.51/18,665.81 = 5,786.26/x
3. Step 3: Cross multiply
   12,443.51x = 18,665.81 × 5,786.26
4. Step 4: Simplify right side
   12,443.51x = 108,005,175.87
5. Step 5: Solve for x
   x = 108,005,175.87/12,443.51
6. Step 6: Final answer
   x = 8,679.64