Finding the Third Proportional to 139,540 and 301,400

Step by Step Solution

1. Step 1: Write the proportion equation
   139,540 : 301,400 = 301,400 : x
2. Step 2: Convert to fraction form
   139,540/301,400 = 301,400/x
3. Step 3: Cross multiply
   139,540x = 301,400 × 301,400
4. Step 4: Simplify right side
   139,540x = 90,841,960,000
5. Step 5: Solve for x
   x = 90,841,960,000/139,540
6. Step 6: Final answer
   x = 651,010.18