Finding the Third Proportional to 156,980 and 335,505

Step by Step Solution

1. Step 1: Write the proportion equation
   156,980 : 335,505 = 335,505 : x
2. Step 2: Convert to fraction form
   156,980/335,505 = 335,505/x
3. Step 3: Cross multiply
   156,980x = 335,505 × 335,505
4. Step 4: Simplify right side
   156,980x = 112,563,605,025
5. Step 5: Solve for x
   x = 112,563,605,025/156,980
6. Step 6: Final answer
   x = 717,056.98