Finding the Fourth Proportional to 15,747.31, 21,732.27 and 8,673.73

Step by Step Solution

1. Step 1: Write the proportion equation
   15,747.31 : 21,732.27 = 8,673.73 : x
2. Step 2: Convert to fraction form
   15,747.31/21,732.27 = 8,673.73/x
3. Step 3: Cross multiply
   15,747.31x = 21,732.27 × 8,673.73
4. Step 4: Simplify right side
   15,747.31x = 188,499,842.27
5. Step 5: Solve for x
   x = 188,499,842.27/15,747.31
6. Step 6: Final answer
   x = 11,970.29