Finding the Third Proportional to 171,309 and 243,510

Step by Step Solution

1. Step 1: Write the proportion equation
   171,309 : 243,510 = 243,510 : x
2. Step 2: Convert to fraction form
   171,309/243,510 = 243,510/x
3. Step 3: Cross multiply
   171,309x = 243,510 × 243,510
4. Step 4: Simplify right side
   171,309x = 59,297,120,100
5. Step 5: Solve for x
   x = 59,297,120,100/171,309
6. Step 6: Final answer
   x = 346,141.30