Finding the Fourth Proportional to 21,105.54, 31,658.60 and 5,523.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,105.54 : 31,658.60 = 5,523.16 : x
2. Step 2: Convert to fraction form
   21,105.54/31,658.60 = 5,523.16/x
3. Step 3: Cross multiply
   21,105.54x = 31,658.60 × 5,523.16
4. Step 4: Simplify right side
   21,105.54x = 174,855,513.18
5. Step 5: Solve for x
   x = 174,855,513.18/21,105.54
6. Step 6: Final answer
   x = 8,284.82