Finding the Fourth Proportional to 21,789.07, 30,061.40 and 12,227.65

Step by Step Solution

1. Step 1: Write the proportion equation
   21,789.07 : 30,061.40 = 12,227.65 : x
2. Step 2: Convert to fraction form
   21,789.07/30,061.40 = 12,227.65/x
3. Step 3: Cross multiply
   21,789.07x = 30,061.40 × 12,227.65
4. Step 4: Simplify right side
   21,789.07x = 367,580,124.94
5. Step 5: Solve for x
   x = 367,580,124.94/21,789.07
6. Step 6: Final answer
   x = 16,869.93