Finding the Third Proportional to 67,518 and 145,412

Step by Step Solution

1. Step 1: Write the proportion equation
   67,518 : 145,412 = 145,412 : x
2. Step 2: Convert to fraction form
   67,518/145,412 = 145,412/x
3. Step 3: Cross multiply
   67,518x = 145,412 × 145,412
4. Step 4: Simplify right side
   67,518x = 21,144,649,744
5. Step 5: Solve for x
   x = 21,144,649,744/67,518
6. Step 6: Final answer
   x = 313,170.56