Finding the Fourth Proportional to 12,619.89, 17,413.94 and 7,242.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,619.89 : 17,413.94 = 7,242.03 : x
2. Step 2: Convert to fraction form
   12,619.89/17,413.94 = 7,242.03/x
3. Step 3: Cross multiply
   12,619.89x = 17,413.94 × 7,242.03
4. Step 4: Simplify right side
   12,619.89x = 126,112,239.69
5. Step 5: Solve for x
   x = 126,112,239.69/12,619.89
6. Step 6: Final answer
   x = 9,993.13