Finding the Fourth Proportional to 12,167.72, 16,791.50 and 6,578.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,167.72 : 16,791.50 = 6,578.72 : x
2. Step 2: Convert to fraction form
   12,167.72/16,791.50 = 6,578.72/x
3. Step 3: Cross multiply
   12,167.72x = 16,791.50 × 6,578.72
4. Step 4: Simplify right side
   12,167.72x = 110,466,572.34
5. Step 5: Solve for x
   x = 110,466,572.34/12,167.72
6. Step 6: Final answer
   x = 9,078.66