Finding the Fourth Proportional to 21,785.94, 30,064.55 and 12,354.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,785.94 : 30,064.55 = 12,354.48 : x
2. Step 2: Convert to fraction form
   21,785.94/30,064.55 = 12,354.48/x
3. Step 3: Cross multiply
   21,785.94x = 30,064.55 × 12,354.48
4. Step 4: Simplify right side
   21,785.94x = 371,431,819.91
5. Step 5: Solve for x
   x = 371,431,819.91/21,785.94
6. Step 6: Final answer
   x = 17,049.15