Finding the Fourth Proportional to 20,443.86, 28,205.52 and 13,282.74

Step by Step Solution

1. Step 1: Write the proportion equation
   20,443.86 : 28,205.52 = 13,282.74 : x
2. Step 2: Convert to fraction form
   20,443.86/28,205.52 = 13,282.74/x
3. Step 3: Cross multiply
   20,443.86x = 28,205.52 × 13,282.74
4. Step 4: Simplify right side
   20,443.86x = 374,646,588.72
5. Step 5: Solve for x
   x = 374,646,588.72/20,443.86
6. Step 6: Final answer
   x = 18,325.63