Finding the Third Proportional to 227,638 and 498,640

Step by Step Solution

1. Step 1: Write the proportion equation
   227,638 : 498,640 = 498,640 : x
2. Step 2: Convert to fraction form
   227,638/498,640 = 498,640/x
3. Step 3: Cross multiply
   227,638x = 498,640 × 498,640
4. Step 4: Simplify right side
   227,638x = 248,641,849,600
5. Step 5: Solve for x
   x = 248,641,849,600/227,638
6. Step 6: Final answer
   x = 1,092,268.64