Finding the Fourth Proportional to 13,413.46, 18,510.61 and 7,445.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.46 : 18,510.61 = 7,445.13 : x
2. Step 2: Convert to fraction form
   13,413.46/18,510.61 = 7,445.13/x
3. Step 3: Cross multiply
   13,413.46x = 18,510.61 × 7,445.13
4. Step 4: Simplify right side
   13,413.46x = 137,813,897.83
5. Step 5: Solve for x
   x = 137,813,897.83/13,413.46
6. Step 6: Final answer
   x = 10,274.30