Finding the Fourth Proportional to 13,731.34, 18,949.35 and 7,443.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,731.34 : 18,949.35 = 7,443.76 : x
2. Step 2: Convert to fraction form
   13,731.34/18,949.35 = 7,443.76/x
3. Step 3: Cross multiply
   13,731.34x = 18,949.35 × 7,443.76
4. Step 4: Simplify right side
   13,731.34x = 141,054,413.56
5. Step 5: Solve for x
   x = 141,054,413.56/13,731.34
6. Step 6: Final answer
   x = 10,272.44