Finding the Third Proportional to 140,457 and 307,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,457 : 307,189.50 = 307,189.50 : x
2. Step 2: Convert to fraction form
   140,457/307,189.50 = 307,189.50/x
3. Step 3: Cross multiply
   140,457x = 307,189.50 × 307,189.50
4. Step 4: Simplify right side
   140,457x = 94,365,388,910.25
5. Step 5: Solve for x
   x = 94,365,388,910.25/140,457
6. Step 6: Final answer
   x = 671,845.40