Finding the Fourth Proportional to 498.52, 747.78 and 238.51

Step by Step Solution

1. Step 1: Write the proportion equation
   498.52 : 747.78 = 238.51 : x
2. Step 2: Convert to fraction form
   498.52/747.78 = 238.51/x
3. Step 3: Cross multiply
   498.52x = 747.78 × 238.51
4. Step 4: Simplify right side
   498.52x = 178,353.01
5. Step 5: Solve for x
   x = 178,353.01/498.52
6. Step 6: Final answer
   x = 357.77