Finding the Third Proportional to 142,434 and 307,710

Step by Step Solution

1. Step 1: Write the proportion equation
   142,434 : 307,710 = 307,710 : x
2. Step 2: Convert to fraction form
   142,434/307,710 = 307,710/x
3. Step 3: Cross multiply
   142,434x = 307,710 × 307,710
4. Step 4: Simplify right side
   142,434x = 94,685,444,100
5. Step 5: Solve for x
   x = 94,685,444,100/142,434
6. Step 6: Final answer
   x = 664,767.15