Finding the Fourth Proportional to 498.16, 744.18 and 412.72

Step by Step Solution

1. Step 1: Write the proportion equation
   498.16 : 744.18 = 412.72 : x
2. Step 2: Convert to fraction form
   498.16/744.18 = 412.72/x
3. Step 3: Cross multiply
   498.16x = 744.18 × 412.72
4. Step 4: Simplify right side
   498.16x = 307,137.97
5. Step 5: Solve for x
   x = 307,137.97/498.16
6. Step 6: Final answer
   x = 616.54