Finding the Fourth Proportional to 13,279.96, 18,327.42 and 7,615.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,279.96 : 18,327.42 = 7,615.23 : x
2. Step 2: Convert to fraction form
   13,279.96/18,327.42 = 7,615.23/x
3. Step 3: Cross multiply
   13,279.96x = 18,327.42 × 7,615.23
4. Step 4: Simplify right side
   13,279.96x = 139,567,480.53
5. Step 5: Solve for x
   x = 139,567,480.53/13,279.96
6. Step 6: Final answer
   x = 10,509.63