Finding the Fourth Proportional to 21,540.36, 32,300.82 and 8,382.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,540.36 : 32,300.82 = 8,382.72 : x
2. Step 2: Convert to fraction form
   21,540.36/32,300.82 = 8,382.72/x
3. Step 3: Cross multiply
   21,540.36x = 32,300.82 × 8,382.72
4. Step 4: Simplify right side
   21,540.36x = 270,768,729.83
5. Step 5: Solve for x
   x = 270,768,729.83/21,540.36
6. Step 6: Final answer
   x = 12,570.30