Finding the Fourth Proportional to 13,381.72, 18,466.94 and 7,413.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,381.72 : 18,466.94 = 7,413.50 : x
2. Step 2: Convert to fraction form
   13,381.72/18,466.94 = 7,413.50/x
3. Step 3: Cross multiply
   13,381.72x = 18,466.94 × 7,413.50
4. Step 4: Simplify right side
   13,381.72x = 136,904,659.69
5. Step 5: Solve for x
   x = 136,904,659.69/13,381.72
6. Step 6: Final answer
   x = 10,230.72