Finding the Fourth Proportional to 21,857.86, 32,786.72 and 9,369.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,857.86 : 32,786.72 = 9,369.79 : x
2. Step 2: Convert to fraction form
   21,857.86/32,786.72 = 9,369.79/x
3. Step 3: Cross multiply
   21,857.86x = 32,786.72 × 9,369.79
4. Step 4: Simplify right side
   21,857.86x = 307,204,679.72
5. Step 5: Solve for x
   x = 307,204,679.72/21,857.86
6. Step 6: Final answer
   x = 14,054.65