Finding the Fourth Proportional to 15,443.37, 21,311.89 and 8,369.79

Step by Step Solution

1. Step 1: Write the proportion equation
   15,443.37 : 21,311.89 = 8,369.79 : x
2. Step 2: Convert to fraction form
   15,443.37/21,311.89 = 8,369.79/x
3. Step 3: Cross multiply
   15,443.37x = 21,311.89 × 8,369.79
4. Step 4: Simplify right side
   15,443.37x = 178,376,022.88
5. Step 5: Solve for x
   x = 178,376,022.88/15,443.37
6. Step 6: Final answer
   x = 11,550.33