Finding the Fourth Proportional to 22,379.30, 30,885.79 and 12,819.94

Step by Step Solution

1. Step 1: Write the proportion equation
   22,379.30 : 30,885.79 = 12,819.94 : x
2. Step 2: Convert to fraction form
   22,379.30/30,885.79 = 12,819.94/x
3. Step 3: Cross multiply
   22,379.30x = 30,885.79 × 12,819.94
4. Step 4: Simplify right side
   22,379.30x = 395,953,974.65
5. Step 5: Solve for x
   x = 395,953,974.65/22,379.30
6. Step 6: Final answer
   x = 17,692.87