Finding the Fourth Proportional to 21,808.21, 30,096.89 and 12,377.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,808.21 : 30,096.89 = 12,377.38 : x
2. Step 2: Convert to fraction form
   21,808.21/30,096.89 = 12,377.38/x
3. Step 3: Cross multiply
   21,808.21x = 30,096.89 × 12,377.38
4. Step 4: Simplify right side
   21,808.21x = 372,520,644.35
5. Step 5: Solve for x
   x = 372,520,644.35/21,808.21
6. Step 6: Final answer
   x = 17,081.67