Finding the Fourth Proportional to 3,791.34, 5,231.88 and 2,112.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,791.34 : 5,231.88 = 2,112.69 : x
2. Step 2: Convert to fraction form
   3,791.34/5,231.88 = 2,112.69/x
3. Step 3: Cross multiply
   3,791.34x = 5,231.88 × 2,112.69
4. Step 4: Simplify right side
   3,791.34x = 11,053,340.56
5. Step 5: Solve for x
   x = 11,053,340.56/3,791.34
6. Step 6: Final answer
   x = 2,915.42