Finding the Fourth Proportional to 22,376.79, 30,880.17 and 12,305.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,376.79 : 30,880.17 = 12,305.30 : x
2. Step 2: Convert to fraction form
   22,376.79/30,880.17 = 12,305.30/x
3. Step 3: Cross multiply
   22,376.79x = 30,880.17 × 12,305.30
4. Step 4: Simplify right side
   22,376.79x = 379,989,601.50
5. Step 5: Solve for x
   x = 379,989,601.50/22,376.79
6. Step 6: Final answer
   x = 16,981.42