Finding the Fourth Proportional to 22,380.56, 30,884.52 and 12,309

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.56 : 30,884.52 = 12,309 : x
2. Step 2: Convert to fraction form
   22,380.56/30,884.52 = 12,309/x
3. Step 3: Cross multiply
   22,380.56x = 30,884.52 × 12,309
4. Step 4: Simplify right side
   22,380.56x = 380,157,556.68
5. Step 5: Solve for x
   x = 380,157,556.68/22,380.56
6. Step 6: Final answer
   x = 16,986.06