Finding the Fourth Proportional to 21,930.76, 30,257.94 and 12,498.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.76 : 30,257.94 = 12,498.76 : x
2. Step 2: Convert to fraction form
   21,930.76/30,257.94 = 12,498.76/x
3. Step 3: Cross multiply
   21,930.76x = 30,257.94 × 12,498.76
4. Step 4: Simplify right side
   21,930.76x = 378,186,730.15
5. Step 5: Solve for x
   x = 378,186,730.15/21,930.76
6. Step 6: Final answer
   x = 17,244.58