Finding the Third Proportional to 67,578 and 146,680

Step by Step Solution

1. Step 1: Write the proportion equation
   67,578 : 146,680 = 146,680 : x
2. Step 2: Convert to fraction form
   67,578/146,680 = 146,680/x
3. Step 3: Cross multiply
   67,578x = 146,680 × 146,680
4. Step 4: Simplify right side
   67,578x = 21,515,022,400
5. Step 5: Solve for x
   x = 21,515,022,400/67,578
6. Step 6: Final answer
   x = 318,373.17