Finding the Third Proportional to 161,958 and 334,290

Step by Step Solution

1. Step 1: Write the proportion equation
   161,958 : 334,290 = 334,290 : x
2. Step 2: Convert to fraction form
   161,958/334,290 = 334,290/x
3. Step 3: Cross multiply
   161,958x = 334,290 × 334,290
4. Step 4: Simplify right side
   161,958x = 111,749,804,100
5. Step 5: Solve for x
   x = 111,749,804,100/161,958
6. Step 6: Final answer
   x = 689,992.49