Finding the Fourth Proportional to 6,646.42, 9,171.72 and 3,662.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,646.42 : 9,171.72 = 3,662.18 : x
2. Step 2: Convert to fraction form
   6,646.42/9,171.72 = 3,662.18/x
3. Step 3: Cross multiply
   6,646.42x = 9,171.72 × 3,662.18
4. Step 4: Simplify right side
   6,646.42x = 33,588,489.55
5. Step 5: Solve for x
   x = 33,588,489.55/6,646.42
6. Step 6: Final answer
   x = 5,053.62