Finding the Third Proportional to 140,828 and 300,160

Step by Step Solution

1. Step 1: Write the proportion equation
   140,828 : 300,160 = 300,160 : x
2. Step 2: Convert to fraction form
   140,828/300,160 = 300,160/x
3. Step 3: Cross multiply
   140,828x = 300,160 × 300,160
4. Step 4: Simplify right side
   140,828x = 90,096,025,600
5. Step 5: Solve for x
   x = 90,096,025,600/140,828
6. Step 6: Final answer
   x = 639,759.32