Finding the Third Proportional to 155,540 and 335,890

Step by Step Solution

1. Step 1: Write the proportion equation
   155,540 : 335,890 = 335,890 : x
2. Step 2: Convert to fraction form
   155,540/335,890 = 335,890/x
3. Step 3: Cross multiply
   155,540x = 335,890 × 335,890
4. Step 4: Simplify right side
   155,540x = 112,822,092,100
5. Step 5: Solve for x
   x = 112,822,092,100/155,540
6. Step 6: Final answer
   x = 725,357.41