Finding the Fourth Proportional to 21,881.22, 30,196.17 and 12,449.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,881.22 : 30,196.17 = 12,449.58 : x
2. Step 2: Convert to fraction form
   21,881.22/30,196.17 = 12,449.58/x
3. Step 3: Cross multiply
   21,881.22x = 30,196.17 × 12,449.58
4. Step 4: Simplify right side
   21,881.22x = 375,929,634.11
5. Step 5: Solve for x
   x = 375,929,634.11/21,881.22
6. Step 6: Final answer
   x = 17,180.47