Finding the Fourth Proportional to 21,118.19, 31,683.27 and 10,575.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,118.19 : 31,683.27 = 10,575.49 : x
2. Step 2: Convert to fraction form
   21,118.19/31,683.27 = 10,575.49/x
3. Step 3: Cross multiply
   21,118.19x = 31,683.27 × 10,575.49
4. Step 4: Simplify right side
   21,118.19x = 335,066,105.05
5. Step 5: Solve for x
   x = 335,066,105.05/21,118.19
6. Step 6: Final answer
   x = 15,866.23