Finding the Fourth Proportional to 1,228.72, 1,843.01 and 498.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.72 : 1,843.01 = 498.10 : x
2. Step 2: Convert to fraction form
   1,228.72/1,843.01 = 498.10/x
3. Step 3: Cross multiply
   1,228.72x = 1,843.01 × 498.10
4. Step 4: Simplify right side
   1,228.72x = 917,991.58
5. Step 5: Solve for x
   x = 917,991.58/1,228.72
6. Step 6: Final answer
   x = 747.12