Finding the Third Proportional to 156,978 and 339,104

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978 : 339,104 = 339,104 : x
2. Step 2: Convert to fraction form
   156,978/339,104 = 339,104/x
3. Step 3: Cross multiply
   156,978x = 339,104 × 339,104
4. Step 4: Simplify right side
   156,978x = 114,991,522,816
5. Step 5: Solve for x
   x = 114,991,522,816/156,978
6. Step 6: Final answer
   x = 732,532.73