Finding the Fourth Proportional to 13,046.72, 18,004.47 and 7,078.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,046.72 : 18,004.47 = 7,078.38 : x
2. Step 2: Convert to fraction form
   13,046.72/18,004.47 = 7,078.38/x
3. Step 3: Cross multiply
   13,046.72x = 18,004.47 × 7,078.38
4. Step 4: Simplify right side
   13,046.72x = 127,442,521.68
5. Step 5: Solve for x
   x = 127,442,521.68/13,046.72
6. Step 6: Final answer
   x = 9,768.17