Finding the Fourth Proportional to 12,644.31, 17,449.16 and 7,055.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.31 : 17,449.16 = 7,055.31 : x
2. Step 2: Convert to fraction form
   12,644.31/17,449.16 = 7,055.31/x
3. Step 3: Cross multiply
   12,644.31x = 17,449.16 × 7,055.31
4. Step 4: Simplify right side
   12,644.31x = 123,109,233.04
5. Step 5: Solve for x
   x = 123,109,233.04/12,644.31
6. Step 6: Final answer
   x = 9,736.33