Finding the Fourth Proportional to 22,069.59, 30,452.85 and 12,989.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,069.59 : 30,452.85 = 12,989.55 : x
2. Step 2: Convert to fraction form
   22,069.59/30,452.85 = 12,989.55/x
3. Step 3: Cross multiply
   22,069.59x = 30,452.85 × 12,989.55
4. Step 4: Simplify right side
   22,069.59x = 395,568,817.72
5. Step 5: Solve for x
   x = 395,568,817.72/22,069.59
6. Step 6: Final answer
   x = 17,923.70