Finding the Fourth Proportional to 1,085.24, 1,626.26 and 498.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.24 : 1,626.26 = 498.79 : x
2. Step 2: Convert to fraction form
   1,085.24/1,626.26 = 498.79/x
3. Step 3: Cross multiply
   1,085.24x = 1,626.26 × 498.79
4. Step 4: Simplify right side
   1,085.24x = 811,162.23
5. Step 5: Solve for x
   x = 811,162.23/1,085.24
6. Step 6: Final answer
   x = 747.45