Finding the Fourth Proportional to 13,168.86, 18,185.16 and 8,461.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,168.86 : 18,185.16 = 8,461.35 : x
2. Step 2: Convert to fraction form
   13,168.86/18,185.16 = 8,461.35/x
3. Step 3: Cross multiply
   13,168.86x = 18,185.16 × 8,461.35
4. Step 4: Simplify right side
   13,168.86x = 153,871,003.57
5. Step 5: Solve for x
   x = 153,871,003.57/13,168.86
6. Step 6: Final answer
   x = 11,684.46