Finding the Third Proportional to 231,790 and 488,490

Step by Step Solution

1. Step 1: Write the proportion equation
   231,790 : 488,490 = 488,490 : x
2. Step 2: Convert to fraction form
   231,790/488,490 = 488,490/x
3. Step 3: Cross multiply
   231,790x = 488,490 × 488,490
4. Step 4: Simplify right side
   231,790x = 238,622,480,100
5. Step 5: Solve for x
   x = 238,622,480,100/231,790
6. Step 6: Final answer
   x = 1,029,477.03