Finding the Fourth Proportional to 20,211.50, 27,892.71 and 11,259

Step by Step Solution

1. Step 1: Write the proportion equation
   20,211.50 : 27,892.71 = 11,259 : x
2. Step 2: Convert to fraction form
   20,211.50/27,892.71 = 11,259/x
3. Step 3: Cross multiply
   20,211.50x = 27,892.71 × 11,259
4. Step 4: Simplify right side
   20,211.50x = 314,044,021.89
5. Step 5: Solve for x
   x = 314,044,021.89/20,211.50
6. Step 6: Final answer
   x = 15,537.89