Finding the Fourth Proportional to 20,646.77, 30,974.74 and 8,168.04

Step by Step Solution

1. Step 1: Write the proportion equation
   20,646.77 : 30,974.74 = 8,168.04 : x
2. Step 2: Convert to fraction form
   20,646.77/30,974.74 = 8,168.04/x
3. Step 3: Cross multiply
   20,646.77x = 30,974.74 × 8,168.04
4. Step 4: Simplify right side
   20,646.77x = 253,002,894.89
5. Step 5: Solve for x
   x = 253,002,894.89/20,646.77
6. Step 6: Final answer
   x = 12,253.88