Finding the Third Proportional to 156,978 and 341,980

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978 : 341,980 = 341,980 : x
2. Step 2: Convert to fraction form
   156,978/341,980 = 341,980/x
3. Step 3: Cross multiply
   156,978x = 341,980 × 341,980
4. Step 4: Simplify right side
   156,978x = 116,950,320,400
5. Step 5: Solve for x
   x = 116,950,320,400/156,978
6. Step 6: Final answer
   x = 745,010.90