Finding the Fourth Proportional to 11,978.27, 17,976.82 and 8,306.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.27 : 17,976.82 = 8,306.34 : x
2. Step 2: Convert to fraction form
   11,978.27/17,976.82 = 8,306.34/x
3. Step 3: Cross multiply
   11,978.27x = 17,976.82 × 8,306.34
4. Step 4: Simplify right side
   11,978.27x = 149,321,579.04
5. Step 5: Solve for x
   x = 149,321,579.04/11,978.27
6. Step 6: Final answer
   x = 12,466.04