Finding the Fourth Proportional to 22,231.55, 30,680.43 and 12,160.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,231.55 : 30,680.43 = 12,160.42 : x
2. Step 2: Convert to fraction form
   22,231.55/30,680.43 = 12,160.42/x
3. Step 3: Cross multiply
   22,231.55x = 30,680.43 × 12,160.42
4. Step 4: Simplify right side
   22,231.55x = 373,086,914.58
5. Step 5: Solve for x
   x = 373,086,914.58/22,231.55
6. Step 6: Final answer
   x = 16,781.87