Finding the Fourth Proportional to 22,164, 30,586.40 and 12,228

Step by Step Solution

1. Step 1: Write the proportion equation
   22,164 : 30,586.40 = 12,228 : x
2. Step 2: Convert to fraction form
   22,164/30,586.40 = 12,228/x
3. Step 3: Cross multiply
   22,164x = 30,586.40 × 12,228
4. Step 4: Simplify right side
   22,164x = 374,010,499.20
5. Step 5: Solve for x
   x = 374,010,499.20/22,164
6. Step 6: Final answer
   x = 16,874.68