Finding the Fourth Proportional to 13,745.78, 18,969.39 and 7,458.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,745.78 : 18,969.39 = 7,458.15 : x
2. Step 2: Convert to fraction form
   13,745.78/18,969.39 = 7,458.15/x
3. Step 3: Cross multiply
   13,745.78x = 18,969.39 × 7,458.15
4. Step 4: Simplify right side
   13,745.78x = 141,476,556.03
5. Step 5: Solve for x
   x = 141,476,556.03/13,745.78
6. Step 6: Final answer
   x = 10,292.37