Finding the Fourth Proportional to 13,413.31, 18,510.22 and 7,445.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.31 : 18,510.22 = 7,445.03 : x
2. Step 2: Convert to fraction form
   13,413.31/18,510.22 = 7,445.03/x
3. Step 3: Cross multiply
   13,413.31x = 18,510.22 × 7,445.03
4. Step 4: Simplify right side
   13,413.31x = 137,809,143.21
5. Step 5: Solve for x
   x = 137,809,143.21/13,413.31
6. Step 6: Final answer
   x = 10,274.06