Finding the Fourth Proportional to 6,405.40, 9,609.32 and 4,412.52

Step by Step Solution

1. Step 1: Write the proportion equation
   6,405.40 : 9,609.32 = 4,412.52 : x
2. Step 2: Convert to fraction form
   6,405.40/9,609.32 = 4,412.52/x
3. Step 3: Cross multiply
   6,405.40x = 9,609.32 × 4,412.52
4. Step 4: Simplify right side
   6,405.40x = 42,401,316.69
5. Step 5: Solve for x
   x = 42,401,316.69/6,405.40
6. Step 6: Final answer
   x = 6,619.62