Finding the Third Proportional to 120,297 and 243,510

Step by Step Solution

1. Step 1: Write the proportion equation
   120,297 : 243,510 = 243,510 : x
2. Step 2: Convert to fraction form
   120,297/243,510 = 243,510/x
3. Step 3: Cross multiply
   120,297x = 243,510 × 243,510
4. Step 4: Simplify right side
   120,297x = 59,297,120,100
5. Step 5: Solve for x
   x = 59,297,120,100/120,297
6. Step 6: Final answer
   x = 492,922.68