Finding the Fourth Proportional to 21,142.58, 31,729.25 and 17,032.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.58 : 31,729.25 = 17,032.23 : x
2. Step 2: Convert to fraction form
   21,142.58/31,729.25 = 17,032.23/x
3. Step 3: Cross multiply
   21,142.58x = 31,729.25 × 17,032.23
4. Step 4: Simplify right side
   21,142.58x = 540,419,926.31
5. Step 5: Solve for x
   x = 540,419,926.31/21,142.58
6. Step 6: Final answer
   x = 25,560.74