Finding the Fourth Proportional to 498.55, 747.86 and 151.91

Step by Step Solution

1. Step 1: Write the proportion equation
   498.55 : 747.86 = 151.91 : x
2. Step 2: Convert to fraction form
   498.55/747.86 = 151.91/x
3. Step 3: Cross multiply
   498.55x = 747.86 × 151.91
4. Step 4: Simplify right side
   498.55x = 113,607.03
5. Step 5: Solve for x
   x = 113,607.03/498.55
6. Step 6: Final answer
   x = 227.88