Finding the Third Proportional to 166,308 and 342,420

Step by Step Solution

1. Step 1: Write the proportion equation
   166,308 : 342,420 = 342,420 : x
2. Step 2: Convert to fraction form
   166,308/342,420 = 342,420/x
3. Step 3: Cross multiply
   166,308x = 342,420 × 342,420
4. Step 4: Simplify right side
   166,308x = 117,251,456,400
5. Step 5: Solve for x
   x = 117,251,456,400/166,308
6. Step 6: Final answer
   x = 705,025.95