Finding the Fourth Proportional to 31,571.54, 43,584.48 and 19,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,571.54 : 43,584.48 = 19,638.72 : x
2. Step 2: Convert to fraction form
   31,571.54/43,584.48 = 19,638.72/x
3. Step 3: Cross multiply
   31,571.54x = 43,584.48 × 19,638.72
4. Step 4: Simplify right side
   31,571.54x = 855,943,399.07
5. Step 5: Solve for x
   x = 855,943,399.07/31,571.54
6. Step 6: Final answer
   x = 27,111.23