Finding the Fourth Proportional to 31,584.72, 43,571.18 and 18,828.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,584.72 : 43,571.18 = 18,828.91 : x
2. Step 2: Convert to fraction form
   31,584.72/43,571.18 = 18,828.91/x
3. Step 3: Cross multiply
   31,584.72x = 43,571.18 × 18,828.91
4. Step 4: Simplify right side
   31,584.72x = 820,397,813.39
5. Step 5: Solve for x
   x = 820,397,813.39/31,584.72
6. Step 6: Final answer
   x = 25,974.52