Finding the Fourth Proportional to 31,789.36, 43,871.42 and 17,642.21

Step by Step Solution

1. Step 1: Write the proportion equation
   31,789.36 : 43,871.42 = 17,642.21 : x
2. Step 2: Convert to fraction form
   31,789.36/43,871.42 = 17,642.21/x
3. Step 3: Cross multiply
   31,789.36x = 43,871.42 × 17,642.21
4. Step 4: Simplify right side
   31,789.36x = 773,988,629.39
5. Step 5: Solve for x
   x = 773,988,629.39/31,789.36
6. Step 6: Final answer
   x = 24,347.41