Finding the Fourth Proportional to 13,413.89, 18,510.80 and 7,364.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.89 : 18,510.80 = 7,364.14 : x
2. Step 2: Convert to fraction form
   13,413.89/18,510.80 = 7,364.14/x
3. Step 3: Cross multiply
   13,413.89x = 18,510.80 × 7,364.14
4. Step 4: Simplify right side
   13,413.89x = 136,316,039.61
5. Step 5: Solve for x
   x = 136,316,039.61/13,413.89
6. Step 6: Final answer
   x = 10,162.30