Finding the Third Proportional to 166,218 and 342,238

Step by Step Solution

1. Step 1: Write the proportion equation
   166,218 : 342,238 = 342,238 : x
2. Step 2: Convert to fraction form
   166,218/342,238 = 342,238/x
3. Step 3: Cross multiply
   166,218x = 342,238 × 342,238
4. Step 4: Simplify right side
   166,218x = 117,126,848,644
5. Step 5: Solve for x
   x = 117,126,848,644/166,218
6. Step 6: Final answer
   x = 704,658.03