Finding the Fourth Proportional to 22,380.77, 30,884.58 and 12,309.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.77 : 30,884.58 = 12,309.05 : x
2. Step 2: Convert to fraction form
   22,380.77/30,884.58 = 12,309.05/x
3. Step 3: Cross multiply
   22,380.77x = 30,884.58 × 12,309.05
4. Step 4: Simplify right side
   22,380.77x = 380,159,685.03
5. Step 5: Solve for x
   x = 380,159,685.03/22,380.77
6. Step 6: Final answer
   x = 16,986.00