Finding the Fourth Proportional to 22,380.68, 30,884.72 and 12,309.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.68 : 30,884.72 = 12,309.12 : x
2. Step 2: Convert to fraction form
   22,380.68/30,884.72 = 12,309.12/x
3. Step 3: Cross multiply
   22,380.68x = 30,884.72 × 12,309.12
4. Step 4: Simplify right side
   22,380.68x = 380,163,755.42
5. Step 5: Solve for x
   x = 380,163,755.42/22,380.68
6. Step 6: Final answer
   x = 16,986.24