Finding the Fourth Proportional to 11,243.52, 16,856.16 and 8,464.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,243.52 : 16,856.16 = 8,464.86 : x
2. Step 2: Convert to fraction form
   11,243.52/16,856.16 = 8,464.86/x
3. Step 3: Cross multiply
   11,243.52x = 16,856.16 × 8,464.86
4. Step 4: Simplify right side
   11,243.52x = 142,685,034.54
5. Step 5: Solve for x
   x = 142,685,034.54/11,243.52
6. Step 6: Final answer
   x = 12,690.42