Finding the Fourth Proportional to 5,172.42, 7,136.18 and 3,405.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,172.42 : 7,136.18 = 3,405.82 : x
2. Step 2: Convert to fraction form
   5,172.42/7,136.18 = 3,405.82/x
3. Step 3: Cross multiply
   5,172.42x = 7,136.18 × 3,405.82
4. Step 4: Simplify right side
   5,172.42x = 24,304,544.57
5. Step 5: Solve for x
   x = 24,304,544.57/5,172.42
6. Step 6: Final answer
   x = 4,698.87