Finding the Fourth Proportional to 22,379.72, 30,884.70 and 12,308.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,379.72 : 30,884.70 = 12,308.60 : x
2. Step 2: Convert to fraction form
   22,379.72/30,884.70 = 12,308.60/x
3. Step 3: Cross multiply
   22,379.72x = 30,884.70 × 12,308.60
4. Step 4: Simplify right side
   22,379.72x = 380,147,418.42
5. Step 5: Solve for x
   x = 380,147,418.42/22,379.72
6. Step 6: Final answer
   x = 16,986.25