Finding the Fourth Proportional to 7,286.42, 10,055.40 and 4,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,286.42 : 10,055.40 = 4,142.72 : x
2. Step 2: Convert to fraction form
   7,286.42/10,055.40 = 4,142.72/x
3. Step 3: Cross multiply
   7,286.42x = 10,055.40 × 4,142.72
4. Step 4: Simplify right side
   7,286.42x = 41,656,706.69
5. Step 5: Solve for x
   x = 41,656,706.69/7,286.42
6. Step 6: Final answer
   x = 5,717.03