Finding the Third Proportional to 143,739 and 307,181.25

Step by Step Solution

1. Step 1: Write the proportion equation
   143,739 : 307,181.25 = 307,181.25 : x
2. Step 2: Convert to fraction form
   143,739/307,181.25 = 307,181.25/x
3. Step 3: Cross multiply
   143,739x = 307,181.25 × 307,181.25
4. Step 4: Simplify right side
   143,739x = 94,360,320,351.56
5. Step 5: Solve for x
   x = 94,360,320,351.56/143,739
6. Step 6: Final answer
   x = 656,469.85