Finding the Fourth Proportional to 20,958.42, 28,922.61 and 12,006.18

Step by Step Solution

1. Step 1: Write the proportion equation
   20,958.42 : 28,922.61 = 12,006.18 : x
2. Step 2: Convert to fraction form
   20,958.42/28,922.61 = 12,006.18/x
3. Step 3: Cross multiply
   20,958.42x = 28,922.61 × 12,006.18
4. Step 4: Simplify right side
   20,958.42x = 347,250,061.73
5. Step 5: Solve for x
   x = 347,250,061.73/20,958.42
6. Step 6: Final answer
   x = 16,568.52