Finding the Fourth Proportional to 22,380.91, 30,885.50 and 12,309.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.91 : 30,885.50 = 12,309.17 : x
2. Step 2: Convert to fraction form
   22,380.91/30,885.50 = 12,309.17/x
3. Step 3: Cross multiply
   22,380.91x = 30,885.50 × 12,309.17
4. Step 4: Simplify right side
   22,380.91x = 380,174,746.38
5. Step 5: Solve for x
   x = 380,174,746.38/22,380.91
6. Step 6: Final answer
   x = 16,986.57