Finding the Fourth Proportional to 1,228.87, 1,841.69 and 498.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.87 : 1,841.69 = 498.05 : x
2. Step 2: Convert to fraction form
   1,228.87/1,841.69 = 498.05/x
3. Step 3: Cross multiply
   1,228.87x = 1,841.69 × 498.05
4. Step 4: Simplify right side
   1,228.87x = 917,249.85
5. Step 5: Solve for x
   x = 917,249.85/1,228.87
6. Step 6: Final answer
   x = 746.42