Finding the Third Proportional to 156,953 and 339,978

Step by Step Solution

1. Step 1: Write the proportion equation
   156,953 : 339,978 = 339,978 : x
2. Step 2: Convert to fraction form
   156,953/339,978 = 339,978/x
3. Step 3: Cross multiply
   156,953x = 339,978 × 339,978
4. Step 4: Simplify right side
   156,953x = 115,585,040,484
5. Step 5: Solve for x
   x = 115,585,040,484/156,953
6. Step 6: Final answer
   x = 736,430.91