Finding the Fourth Proportional to 16,168.90, 22,312.34 and 8,999.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,168.90 : 22,312.34 = 8,999.18 : x
2. Step 2: Convert to fraction form
   16,168.90/22,312.34 = 8,999.18/x
3. Step 3: Cross multiply
   16,168.90x = 22,312.34 × 8,999.18
4. Step 4: Simplify right side
   16,168.90x = 200,792,763.88
5. Step 5: Solve for x
   x = 200,792,763.88/16,168.90
6. Step 6: Final answer
   x = 12,418.46