Finding the Fourth Proportional to 22,329, 30,815.16 and 12,769.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,329 : 30,815.16 = 12,769.80 : x
2. Step 2: Convert to fraction form
   22,329/30,815.16 = 12,769.80/x
3. Step 3: Cross multiply
   22,329x = 30,815.16 × 12,769.80
4. Step 4: Simplify right side
   22,329x = 393,503,430.17
5. Step 5: Solve for x
   x = 393,503,430.17/22,329
6. Step 6: Final answer
   x = 17,622.98