Finding the Fourth Proportional to 21,078.88, 31,620.14 and 5,496.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,078.88 : 31,620.14 = 5,496.50 : x
2. Step 2: Convert to fraction form
   21,078.88/31,620.14 = 5,496.50/x
3. Step 3: Cross multiply
   21,078.88x = 31,620.14 × 5,496.50
4. Step 4: Simplify right side
   21,078.88x = 173,800,099.51
5. Step 5: Solve for x
   x = 173,800,099.51/21,078.88
6. Step 6: Final answer
   x = 8,245.22