Finding the Fourth Proportional to 12,168.50, 16,795.22 and 7,912.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,168.50 : 16,795.22 = 7,912.16 : x
2. Step 2: Convert to fraction form
   12,168.50/16,795.22 = 7,912.16/x
3. Step 3: Cross multiply
   12,168.50x = 16,795.22 × 7,912.16
4. Step 4: Simplify right side
   12,168.50x = 132,886,467.88
5. Step 5: Solve for x
   x = 132,886,467.88/12,168.50
6. Step 6: Final answer
   x = 10,920.53