Finding the Third Proportional to 156,978 and 335,504

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978 : 335,504 = 335,504 : x
2. Step 2: Convert to fraction form
   156,978/335,504 = 335,504/x
3. Step 3: Cross multiply
   156,978x = 335,504 × 335,504
4. Step 4: Simplify right side
   156,978x = 112,562,934,016
5. Step 5: Solve for x
   x = 112,562,934,016/156,978
6. Step 6: Final answer
   x = 717,061.84