Finding the Fourth Proportional to 498.54, 747.82 and 190.54

Step by Step Solution

1. Step 1: Write the proportion equation
   498.54 : 747.82 = 190.54 : x
2. Step 2: Convert to fraction form
   498.54/747.82 = 190.54/x
3. Step 3: Cross multiply
   498.54x = 747.82 × 190.54
4. Step 4: Simplify right side
   498.54x = 142,485.52
5. Step 5: Solve for x
   x = 142,485.52/498.54
6. Step 6: Final answer
   x = 285.81