Finding the Fourth Proportional to 20,443.86, 30,647.61 and 7,960.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,443.86 : 30,647.61 = 7,960.98 : x
2. Step 2: Convert to fraction form
   20,443.86/30,647.61 = 7,960.98/x
3. Step 3: Cross multiply
   20,443.86x = 30,647.61 × 7,960.98
4. Step 4: Simplify right side
   20,443.86x = 243,985,010.26
5. Step 5: Solve for x
   x = 243,985,010.26/20,443.86
6. Step 6: Final answer
   x = 11,934.39