Finding the Fourth Proportional to 208.72, 287.89 and 146.55

Step by Step Solution

1. Step 1: Write the proportion equation
   208.72 : 287.89 = 146.55 : x
2. Step 2: Convert to fraction form
   208.72/287.89 = 146.55/x
3. Step 3: Cross multiply
   208.72x = 287.89 × 146.55
4. Step 4: Simplify right side
   208.72x = 42,189.55
5. Step 5: Solve for x
   x = 42,189.55/208.72
6. Step 6: Final answer
   x = 202.14