Finding the Fourth Proportional to 20,757.42, 31,133.82 and 7,429.89

Step by Step Solution

1. Step 1: Write the proportion equation
   20,757.42 : 31,133.82 = 7,429.89 : x
2. Step 2: Convert to fraction form
   20,757.42/31,133.82 = 7,429.89/x
3. Step 3: Cross multiply
   20,757.42x = 31,133.82 × 7,429.89
4. Step 4: Simplify right side
   20,757.42x = 231,320,857.88
5. Step 5: Solve for x
   x = 231,320,857.88/20,757.42
6. Step 6: Final answer
   x = 11,144.01