Finding the Fourth Proportional to 20,498.06, 30,730.59 and 8,819.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,498.06 : 30,730.59 = 8,819.48 : x
2. Step 2: Convert to fraction form
   20,498.06/30,730.59 = 8,819.48/x
3. Step 3: Cross multiply
   20,498.06x = 30,730.59 × 8,819.48
4. Step 4: Simplify right side
   20,498.06x = 271,027,900.72
5. Step 5: Solve for x
   x = 271,027,900.72/20,498.06
6. Step 6: Final answer
   x = 13,222.12