Finding the Fourth Proportional to 13,413.10, 18,510.28 and 7,445.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.10 : 18,510.28 = 7,445.16 : x
2. Step 2: Convert to fraction form
   13,413.10/18,510.28 = 7,445.16/x
3. Step 3: Cross multiply
   13,413.10x = 18,510.28 × 7,445.16
4. Step 4: Simplify right side
   13,413.10x = 137,811,903.69
5. Step 5: Solve for x
   x = 137,811,903.69/13,413.10
6. Step 6: Final answer
   x = 10,274.43