Finding the Fourth Proportional to 21,836.28, 30,134.07 and 12,404.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,836.28 : 30,134.07 = 12,404.82 : x
2. Step 2: Convert to fraction form
   21,836.28/30,134.07 = 12,404.82/x
3. Step 3: Cross multiply
   21,836.28x = 30,134.07 × 12,404.82
4. Step 4: Simplify right side
   21,836.28x = 373,807,714.22
5. Step 5: Solve for x
   x = 373,807,714.22/21,836.28
6. Step 6: Final answer
   x = 17,118.65