Finding the Fourth Proportional to 13,013.55, 17,963.31 and 7,708.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,013.55 : 17,963.31 = 7,708.38 : x
2. Step 2: Convert to fraction form
   13,013.55/17,963.31 = 7,708.38/x
3. Step 3: Cross multiply
   13,013.55x = 17,963.31 × 7,708.38
4. Step 4: Simplify right side
   13,013.55x = 138,468,019.54
5. Step 5: Solve for x
   x = 138,468,019.54/13,013.55
6. Step 6: Final answer
   x = 10,640.30