Finding the Fourth Proportional to 21,118, 31,673.56 and 7,084.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,118 : 31,673.56 = 7,084.24 : x
2. Step 2: Convert to fraction form
   21,118/31,673.56 = 7,084.24/x
3. Step 3: Cross multiply
   21,118x = 31,673.56 × 7,084.24
4. Step 4: Simplify right side
   21,118x = 224,383,100.69
5. Step 5: Solve for x
   x = 224,383,100.69/21,118
6. Step 6: Final answer
   x = 10,625.21