Finding the Fourth Proportional to 12,091.33, 16,686.78 and 6,786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,091.33 : 16,686.78 = 6,786.15 : x
2. Step 2: Convert to fraction form
   12,091.33/16,686.78 = 6,786.15/x
3. Step 3: Cross multiply
   12,091.33x = 16,686.78 × 6,786.15
4. Step 4: Simplify right side
   12,091.33x = 113,238,992.10
5. Step 5: Solve for x
   x = 113,238,992.10/12,091.33
6. Step 6: Final answer
   x = 9,365.30