Finding the Fourth Proportional to 11,945.86, 16,480.92 and 7,228.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.86 : 16,480.92 = 7,228.42 : x
2. Step 2: Convert to fraction form
   11,945.86/16,480.92 = 7,228.42/x
3. Step 3: Cross multiply
   11,945.86x = 16,480.92 × 7,228.42
4. Step 4: Simplify right side
   11,945.86x = 119,131,011.75
5. Step 5: Solve for x
   x = 119,131,011.75/11,945.86
6. Step 6: Final answer
   x = 9,972.58