Finding the Fourth Proportional to 12,721.54, 17,555.46 and 7,055.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,721.54 : 17,555.46 = 7,055.38 : x
2. Step 2: Convert to fraction form
   12,721.54/17,555.46 = 7,055.38/x
3. Step 3: Cross multiply
   12,721.54x = 17,555.46 × 7,055.38
4. Step 4: Simplify right side
   12,721.54x = 123,860,441.37
5. Step 5: Solve for x
   x = 123,860,441.37/12,721.54
6. Step 6: Final answer
   x = 9,736.28