Finding the Fourth Proportional to 33,680.50, 50,528.04 and 12,904

Step by Step Solution

1. Step 1: Write the proportion equation
   33,680.50 : 50,528.04 = 12,904 : x
2. Step 2: Convert to fraction form
   33,680.50/50,528.04 = 12,904/x
3. Step 3: Cross multiply
   33,680.50x = 50,528.04 × 12,904
4. Step 4: Simplify right side
   33,680.50x = 652,013,828.16
5. Step 5: Solve for x
   x = 652,013,828.16/33,680.50
6. Step 6: Final answer
   x = 19,358.79