Finding the Fourth Proportional to 1,317.10, 1,976.67 and 496.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.10 : 1,976.67 = 496.12 : x
2. Step 2: Convert to fraction form
   1,317.10/1,976.67 = 496.12/x
3. Step 3: Cross multiply
   1,317.10x = 1,976.67 × 496.12
4. Step 4: Simplify right side
   1,317.10x = 980,662.43
5. Step 5: Solve for x
   x = 980,662.43/1,317.10
6. Step 6: Final answer
   x = 744.56