Finding the Fourth Proportional to 21,851.91, 30,146.83 and 12,647.41

Step by Step Solution

1. Step 1: Write the proportion equation
   21,851.91 : 30,146.83 = 12,647.41 : x
2. Step 2: Convert to fraction form
   21,851.91/30,146.83 = 12,647.41/x
3. Step 3: Cross multiply
   21,851.91x = 30,146.83 × 12,647.41
4. Step 4: Simplify right side
   21,851.91x = 381,279,212.22
5. Step 5: Solve for x
   x = 381,279,212.22/21,851.91
6. Step 6: Final answer
   x = 17,448.32