Finding the Fourth Proportional to 8,111.22, 12,161.97 and 2,915.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.22 : 12,161.97 = 2,915.34 : x
2. Step 2: Convert to fraction form
   8,111.22/12,161.97 = 2,915.34/x
3. Step 3: Cross multiply
   8,111.22x = 12,161.97 × 2,915.34
4. Step 4: Simplify right side
   8,111.22x = 35,456,277.62
5. Step 5: Solve for x
   x = 35,456,277.62/8,111.22
6. Step 6: Final answer
   x = 4,371.26