Finding the Fourth Proportional to 21,112.72, 31,658.46 and 7,067.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,112.72 : 31,658.46 = 7,067.86 : x
2. Step 2: Convert to fraction form
   21,112.72/31,658.46 = 7,067.86/x
3. Step 3: Cross multiply
   21,112.72x = 31,658.46 × 7,067.86
4. Step 4: Simplify right side
   21,112.72x = 223,757,563.10
5. Step 5: Solve for x
   x = 223,757,563.10/21,112.72
6. Step 6: Final answer
   x = 10,598.23