Finding the Fourth Proportional to 8,089.12, 12,120.72 and 3,406.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,089.12 : 12,120.72 = 3,406.24 : x
2. Step 2: Convert to fraction form
   8,089.12/12,120.72 = 3,406.24/x
3. Step 3: Cross multiply
   8,089.12x = 12,120.72 × 3,406.24
4. Step 4: Simplify right side
   8,089.12x = 41,286,081.29
5. Step 5: Solve for x
   x = 41,286,081.29/8,089.12
6. Step 6: Final answer
   x = 5,103.90