Finding the Fourth Proportional to 13,323.24, 18,379.98 and 7,731

Step by Step Solution

1. Step 1: Write the proportion equation
   13,323.24 : 18,379.98 = 7,731 : x
2. Step 2: Convert to fraction form
   13,323.24/18,379.98 = 7,731/x
3. Step 3: Cross multiply
   13,323.24x = 18,379.98 × 7,731
4. Step 4: Simplify right side
   13,323.24x = 142,095,625.38
5. Step 5: Solve for x
   x = 142,095,625.38/13,323.24
6. Step 6: Final answer
   x = 10,665.25