Finding the Fourth Proportional to 21,067.74, 31,611.33 and 10,537.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,067.74 : 31,611.33 = 10,537.34 : x
2. Step 2: Convert to fraction form
   21,067.74/31,611.33 = 10,537.34/x
3. Step 3: Cross multiply
   21,067.74x = 31,611.33 × 10,537.34
4. Step 4: Simplify right side
   21,067.74x = 333,099,174.01
5. Step 5: Solve for x
   x = 333,099,174.01/21,067.74
6. Step 6: Final answer
   x = 15,810.86