Finding the Fourth Proportional to 21,090.34, 29,103.42 and 11,658.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,090.34 : 29,103.42 = 11,658.34 : x
2. Step 2: Convert to fraction form
   21,090.34/29,103.42 = 11,658.34/x
3. Step 3: Cross multiply
   21,090.34x = 29,103.42 × 11,658.34
4. Step 4: Simplify right side
   21,090.34x = 339,297,565.52
5. Step 5: Solve for x
   x = 339,297,565.52/21,090.34
6. Step 6: Final answer
   x = 16,087.82