Finding the Third Proportional to 307,189.50 and 673,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,189.50 : 673,429.50 = 673,429.50 : x
2. Step 2: Convert to fraction form
   307,189.50/673,429.50 = 673,429.50/x
3. Step 3: Cross multiply
   307,189.50x = 673,429.50 × 673,429.50
4. Step 4: Simplify right side
   307,189.50x = 453,507,291,470.25
5. Step 5: Solve for x
   x = 453,507,291,470.25/307,189.50
6. Step 6: Final answer
   x = 1,476,311.17