Finding the Fourth Proportional to 21,930.10, 30,263.61 and 12,498.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.10 : 30,263.61 = 12,498.82 : x
2. Step 2: Convert to fraction form
   21,930.10/30,263.61 = 12,498.82/x
3. Step 3: Cross multiply
   21,930.10x = 30,263.61 × 12,498.82
4. Step 4: Simplify right side
   21,930.10x = 378,259,413.94
5. Step 5: Solve for x
   x = 378,259,413.94/21,930.10
6. Step 6: Final answer
   x = 17,248.41