Finding the Fourth Proportional to 8,561.90, 12,843.34 and 8,096.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.90 : 12,843.34 = 8,096.46 : x
2. Step 2: Convert to fraction form
   8,561.90/12,843.34 = 8,096.46/x
3. Step 3: Cross multiply
   8,561.90x = 12,843.34 × 8,096.46
4. Step 4: Simplify right side
   8,561.90x = 103,985,588.58
5. Step 5: Solve for x
   x = 103,985,588.58/8,561.90
6. Step 6: Final answer
   x = 12,145.15