Finding the Fourth Proportional to 8,061.20, 12,080.46 and 6,410.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.20 : 12,080.46 = 6,410.42 : x
2. Step 2: Convert to fraction form
   8,061.20/12,080.46 = 6,410.42/x
3. Step 3: Cross multiply
   8,061.20x = 12,080.46 × 6,410.42
4. Step 4: Simplify right side
   8,061.20x = 77,440,822.39
5. Step 5: Solve for x
   x = 77,440,822.39/8,061.20
6. Step 6: Final answer
   x = 9,606.61