Finding the Fourth Proportional to 21,769.82, 30,042.69 and 12,211.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,769.82 : 30,042.69 = 12,211.83 : x
2. Step 2: Convert to fraction form
   21,769.82/30,042.69 = 12,211.83/x
3. Step 3: Cross multiply
   21,769.82x = 30,042.69 × 12,211.83
4. Step 4: Simplify right side
   21,769.82x = 366,876,011.75
5. Step 5: Solve for x
   x = 366,876,011.75/21,769.82
6. Step 6: Final answer
   x = 16,852.51