Finding the Fourth Proportional to 11,867.42, 17,768.32 and 8,936.84

Step by Step Solution

1. Step 1: Write the proportion equation
   11,867.42 : 17,768.32 = 8,936.84 : x
2. Step 2: Convert to fraction form
   11,867.42/17,768.32 = 8,936.84/x
3. Step 3: Cross multiply
   11,867.42x = 17,768.32 × 8,936.84
4. Step 4: Simplify right side
   11,867.42x = 158,792,632.91
5. Step 5: Solve for x
   x = 158,792,632.91/11,867.42
6. Step 6: Final answer
   x = 13,380.55