Finding the Fourth Proportional to 9,558.64, 14,340.52 and 8,644.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,558.64 : 14,340.52 = 8,644.72 : x
2. Step 2: Convert to fraction form
   9,558.64/14,340.52 = 8,644.72/x
3. Step 3: Cross multiply
   9,558.64x = 14,340.52 × 8,644.72
4. Step 4: Simplify right side
   9,558.64x = 123,969,780.05
5. Step 5: Solve for x
   x = 123,969,780.05/9,558.64
6. Step 6: Final answer
   x = 12,969.40