Finding the Third Proportional to 67,398 and 143,436

Step by Step Solution

1. Step 1: Write the proportion equation
   67,398 : 143,436 = 143,436 : x
2. Step 2: Convert to fraction form
   67,398/143,436 = 143,436/x
3. Step 3: Cross multiply
   67,398x = 143,436 × 143,436
4. Step 4: Simplify right side
   67,398x = 20,573,886,096
5. Step 5: Solve for x
   x = 20,573,886,096/67,398
6. Step 6: Final answer
   x = 305,259.59