Finding the Fourth Proportional to 8,488.52, 12,731.82 and 2,644.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.52 : 12,731.82 = 2,644.64 : x
2. Step 2: Convert to fraction form
   8,488.52/12,731.82 = 2,644.64/x
3. Step 3: Cross multiply
   8,488.52x = 12,731.82 × 2,644.64
4. Step 4: Simplify right side
   8,488.52x = 33,671,016.79
5. Step 5: Solve for x
   x = 33,671,016.79/8,488.52
6. Step 6: Final answer
   x = 3,966.66