Finding the Third Proportional to 140,457 and 309,544.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,457 : 309,544.50 = 309,544.50 : x
2. Step 2: Convert to fraction form
   140,457/309,544.50 = 309,544.50/x
3. Step 3: Cross multiply
   140,457x = 309,544.50 × 309,544.50
4. Step 4: Simplify right side
   140,457x = 95,817,797,480.25
5. Step 5: Solve for x
   x = 95,817,797,480.25/140,457
6. Step 6: Final answer
   x = 682,185.99