Finding the Fourth Proportional to 498.57, 747.69 and 238.41

Step by Step Solution

1. Step 1: Write the proportion equation
   498.57 : 747.69 = 238.41 : x
2. Step 2: Convert to fraction form
   498.57/747.69 = 238.41/x
3. Step 3: Cross multiply
   498.57x = 747.69 × 238.41
4. Step 4: Simplify right side
   498.57x = 178,256.77
5. Step 5: Solve for x
   x = 178,256.77/498.57
6. Step 6: Final answer
   x = 357.54