Finding the Fourth Proportional to 21,198.38, 31,798.17 and 5,616

Step by Step Solution

1. Step 1: Write the proportion equation
   21,198.38 : 31,798.17 = 5,616 : x
2. Step 2: Convert to fraction form
   21,198.38/31,798.17 = 5,616/x
3. Step 3: Cross multiply
   21,198.38x = 31,798.17 × 5,616
4. Step 4: Simplify right side
   21,198.38x = 178,578,522.72
5. Step 5: Solve for x
   x = 178,578,522.72/21,198.38
6. Step 6: Final answer
   x = 8,424.16