Finding the Fourth Proportional to 12,085.38, 16,676.55 and 6,780.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.38 : 16,676.55 = 6,780.78 : x
2. Step 2: Convert to fraction form
   12,085.38/16,676.55 = 6,780.78/x
3. Step 3: Cross multiply
   12,085.38x = 16,676.55 × 6,780.78
4. Step 4: Simplify right side
   12,085.38x = 113,080,016.71
5. Step 5: Solve for x
   x = 113,080,016.71/12,085.38
6. Step 6: Final answer
   x = 9,356.76