Finding the Fourth Proportional to 245.72, 367.98 and 142.69

Step by Step Solution

1. Step 1: Write the proportion equation
   245.72 : 367.98 = 142.69 : x
2. Step 2: Convert to fraction form
   245.72/367.98 = 142.69/x
3. Step 3: Cross multiply
   245.72x = 367.98 × 142.69
4. Step 4: Simplify right side
   245.72x = 52,507.89
5. Step 5: Solve for x
   x = 52,507.89/245.72
6. Step 6: Final answer
   x = 213.69