Finding the Fourth Proportional to 498.72, 748.16 and 174.18

Step by Step Solution

1. Step 1: Write the proportion equation
   498.72 : 748.16 = 174.18 : x
2. Step 2: Convert to fraction form
   498.72/748.16 = 174.18/x
3. Step 3: Cross multiply
   498.72x = 748.16 × 174.18
4. Step 4: Simplify right side
   498.72x = 130,314.51
5. Step 5: Solve for x
   x = 130,314.51/498.72
6. Step 6: Final answer
   x = 261.30