Finding the Third Proportional to 178,434 and 243,039

Step by Step Solution

1. Step 1: Write the proportion equation
   178,434 : 243,039 = 243,039 : x
2. Step 2: Convert to fraction form
   178,434/243,039 = 243,039/x
3. Step 3: Cross multiply
   178,434x = 243,039 × 243,039
4. Step 4: Simplify right side
   178,434x = 59,067,955,521
5. Step 5: Solve for x
   x = 59,067,955,521/178,434
6. Step 6: Final answer
   x = 331,035.32