Finding the Third Proportional to 178,611 and 243,238

Step by Step Solution

1. Step 1: Write the proportion equation
   178,611 : 243,238 = 243,238 : x
2. Step 2: Convert to fraction form
   178,611/243,238 = 243,238/x
3. Step 3: Cross multiply
   178,611x = 243,238 × 243,238
4. Step 4: Simplify right side
   178,611x = 59,164,724,644
5. Step 5: Solve for x
   x = 59,164,724,644/178,611
6. Step 6: Final answer
   x = 331,249.05