Finding the Third Proportional to 242,128 and 494,090

Step by Step Solution

1. Step 1: Write the proportion equation
   242,128 : 494,090 = 494,090 : x
2. Step 2: Convert to fraction form
   242,128/494,090 = 494,090/x
3. Step 3: Cross multiply
   242,128x = 494,090 × 494,090
4. Step 4: Simplify right side
   242,128x = 244,124,928,100
5. Step 5: Solve for x
   x = 244,124,928,100/242,128
6. Step 6: Final answer
   x = 1,008,247.41