Finding the Fourth Proportional to 21,103.92, 31,653.72 and 5,519.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,103.92 : 31,653.72 = 5,519.52 : x
2. Step 2: Convert to fraction form
   21,103.92/31,653.72 = 5,519.52/x
3. Step 3: Cross multiply
   21,103.92x = 31,653.72 × 5,519.52
4. Step 4: Simplify right side
   21,103.92x = 174,713,340.61
5. Step 5: Solve for x
   x = 174,713,340.61/21,103.92
6. Step 6: Final answer
   x = 8,278.72