Finding the Fourth Proportional to 11,945.89, 17,919.15 and 3,180.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.89 : 17,919.15 = 3,180.82 : x
2. Step 2: Convert to fraction form
   11,945.89/17,919.15 = 3,180.82/x
3. Step 3: Cross multiply
   11,945.89x = 17,919.15 × 3,180.82
4. Step 4: Simplify right side
   11,945.89x = 56,997,590.70
5. Step 5: Solve for x
   x = 56,997,590.70/11,945.89
6. Step 6: Final answer
   x = 4,771.31