Finding the Fourth Proportional to 8,411.82, 12,598.29 and 8,120.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.82 : 12,598.29 = 8,120.22 : x
2. Step 2: Convert to fraction form
   8,411.82/12,598.29 = 8,120.22/x
3. Step 3: Cross multiply
   8,411.82x = 12,598.29 × 8,120.22
4. Step 4: Simplify right side
   8,411.82x = 102,300,886.42
5. Step 5: Solve for x
   x = 102,300,886.42/8,411.82
6. Step 6: Final answer
   x = 12,161.56