Finding the Fourth Proportional to 7,974.69, 11,961.22 and 2,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,974.69 : 11,961.22 = 2,131.89 : x
2. Step 2: Convert to fraction form
   7,974.69/11,961.22 = 2,131.89/x
3. Step 3: Cross multiply
   7,974.69x = 11,961.22 × 2,131.89
4. Step 4: Simplify right side
   7,974.69x = 25,500,005.31
5. Step 5: Solve for x
   x = 25,500,005.31/7,974.69
6. Step 6: Final answer
   x = 3,197.62