Finding the Fourth Proportional to 12,288.72, 16,958.52 and 6,699.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.72 : 16,958.52 = 6,699.72 : x
2. Step 2: Convert to fraction form
   12,288.72/16,958.52 = 6,699.72/x
3. Step 3: Cross multiply
   12,288.72x = 16,958.52 × 6,699.72
4. Step 4: Simplify right side
   12,288.72x = 113,617,335.61
5. Step 5: Solve for x
   x = 113,617,335.61/12,288.72
6. Step 6: Final answer
   x = 9,245.66