Finding the Fourth Proportional to 21,913.82, 30,236.82 and 13,417.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,913.82 : 30,236.82 = 13,417.88 : x
2. Step 2: Convert to fraction form
   21,913.82/30,236.82 = 13,417.88/x
3. Step 3: Cross multiply
   21,913.82x = 30,236.82 × 13,417.88
4. Step 4: Simplify right side
   21,913.82x = 405,714,022.34
5. Step 5: Solve for x
   x = 405,714,022.34/21,913.82
6. Step 6: Final answer
   x = 18,514.07