Finding the Third Proportional to 67,400 and 145,978

Step by Step Solution

1. Step 1: Write the proportion equation
   67,400 : 145,978 = 145,978 : x
2. Step 2: Convert to fraction form
   67,400/145,978 = 145,978/x
3. Step 3: Cross multiply
   67,400x = 145,978 × 145,978
4. Step 4: Simplify right side
   67,400x = 21,309,576,484
5. Step 5: Solve for x
   x = 21,309,576,484/67,400
6. Step 6: Final answer
   x = 316,165.82