Finding the Fourth Proportional to 498.56, 747.97 and 190.42

Step by Step Solution

1. Step 1: Write the proportion equation
   498.56 : 747.97 = 190.42 : x
2. Step 2: Convert to fraction form
   498.56/747.97 = 190.42/x
3. Step 3: Cross multiply
   498.56x = 747.97 × 190.42
4. Step 4: Simplify right side
   498.56x = 142,428.45
5. Step 5: Solve for x
   x = 142,428.45/498.56
6. Step 6: Final answer
   x = 285.68