Finding the Fourth Proportional to 21,773.69, 30,048.01 and 12,215.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,773.69 : 30,048.01 = 12,215.69 : x
2. Step 2: Convert to fraction form
   21,773.69/30,048.01 = 12,215.69/x
3. Step 3: Cross multiply
   21,773.69x = 30,048.01 × 12,215.69
4. Step 4: Simplify right side
   21,773.69x = 367,057,091.38
5. Step 5: Solve for x
   x = 367,057,091.38/21,773.69
6. Step 6: Final answer
   x = 16,857.83