Finding the Fourth Proportional to 21,109.78, 31,680.24 and 10,016.44

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.78 : 31,680.24 = 10,016.44 : x
2. Step 2: Convert to fraction form
   21,109.78/31,680.24 = 10,016.44/x
3. Step 3: Cross multiply
   21,109.78x = 31,680.24 × 10,016.44
4. Step 4: Simplify right side
   21,109.78x = 317,323,223.15
5. Step 5: Solve for x
   x = 317,323,223.15/21,109.78
6. Step 6: Final answer
   x = 15,032.05