Finding the Fourth Proportional to 8,089.40, 12,105.30 and 5,612.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,089.40 : 12,105.30 = 5,612.60 : x
2. Step 2: Convert to fraction form
   8,089.40/12,105.30 = 5,612.60/x
3. Step 3: Cross multiply
   8,089.40x = 12,105.30 × 5,612.60
4. Step 4: Simplify right side
   8,089.40x = 67,942,206.78
5. Step 5: Solve for x
   x = 67,942,206.78/8,089.40
6. Step 6: Final answer
   x = 8,398.92