Finding the Fourth Proportional to 21,111.30, 31,654.38 and 7,067.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.30 : 31,654.38 = 7,067.92 : x
2. Step 2: Convert to fraction form
   21,111.30/31,654.38 = 7,067.92/x
3. Step 3: Cross multiply
   21,111.30x = 31,654.38 × 7,067.92
4. Step 4: Simplify right side
   21,111.30x = 223,730,625.49
5. Step 5: Solve for x
   x = 223,730,625.49/21,111.30
6. Step 6: Final answer
   x = 10,597.67