Finding the Fourth Proportional to 21,494.41, 29,662.27 and 12,540.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,494.41 : 29,662.27 = 12,540.18 : x
2. Step 2: Convert to fraction form
   21,494.41/29,662.27 = 12,540.18/x
3. Step 3: Cross multiply
   21,494.41x = 29,662.27 × 12,540.18
4. Step 4: Simplify right side
   21,494.41x = 371,970,284.89
5. Step 5: Solve for x
   x = 371,970,284.89/21,494.41
6. Step 6: Final answer
   x = 17,305.44