Finding the Fourth Proportional to 498.47, 747.72 and 220.83

Step by Step Solution

1. Step 1: Write the proportion equation
   498.47 : 747.72 = 220.83 : x
2. Step 2: Convert to fraction form
   498.47/747.72 = 220.83/x
3. Step 3: Cross multiply
   498.47x = 747.72 × 220.83
4. Step 4: Simplify right side
   498.47x = 165,119.01
5. Step 5: Solve for x
   x = 165,119.01/498.47
6. Step 6: Final answer
   x = 331.25