Finding the Fourth Proportional to 20,076.80, 27,706.72 and 12,117.49

Step by Step Solution

1. Step 1: Write the proportion equation
   20,076.80 : 27,706.72 = 12,117.49 : x
2. Step 2: Convert to fraction form
   20,076.80/27,706.72 = 12,117.49/x
3. Step 3: Cross multiply
   20,076.80x = 27,706.72 × 12,117.49
4. Step 4: Simplify right side
   20,076.80x = 335,735,902.53
5. Step 5: Solve for x
   x = 335,735,902.53/20,076.80
6. Step 6: Final answer
   x = 16,722.58