Finding the Fourth Proportional to 12,644.38, 17,449.79 and 7,055.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.38 : 17,449.79 = 7,055.38 : x
2. Step 2: Convert to fraction form
   12,644.38/17,449.79 = 7,055.38/x
3. Step 3: Cross multiply
   12,644.38x = 17,449.79 × 7,055.38
4. Step 4: Simplify right side
   12,644.38x = 123,114,899.37
5. Step 5: Solve for x
   x = 123,114,899.37/12,644.38
6. Step 6: Final answer
   x = 9,736.73