Finding the Fourth Proportional to 498.88, 748.72 and 210.52

Step by Step Solution

1. Step 1: Write the proportion equation
   498.88 : 748.72 = 210.52 : x
2. Step 2: Convert to fraction form
   498.88/748.72 = 210.52/x
3. Step 3: Cross multiply
   498.88x = 748.72 × 210.52
4. Step 4: Simplify right side
   498.88x = 157,620.53
5. Step 5: Solve for x
   x = 157,620.53/498.88
6. Step 6: Final answer
   x = 315.95