Finding the Third Proportional to 140,518 and 300,710

Step by Step Solution

1. Step 1: Write the proportion equation
   140,518 : 300,710 = 300,710 : x
2. Step 2: Convert to fraction form
   140,518/300,710 = 300,710/x
3. Step 3: Cross multiply
   140,518x = 300,710 × 300,710
4. Step 4: Simplify right side
   140,518x = 90,426,504,100
5. Step 5: Solve for x
   x = 90,426,504,100/140,518
6. Step 6: Final answer
   x = 643,522.57