Finding the Fourth Proportional to 21,418.82, 32,109.73 and 8,280.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,418.82 : 32,109.73 = 8,280.42 : x
2. Step 2: Convert to fraction form
   21,418.82/32,109.73 = 8,280.42/x
3. Step 3: Cross multiply
   21,418.82x = 32,109.73 × 8,280.42
4. Step 4: Simplify right side
   21,418.82x = 265,882,050.49
5. Step 5: Solve for x
   x = 265,882,050.49/21,418.82
6. Step 6: Final answer
   x = 12,413.48