Finding the Third Proportional to 142,323 and 309,702

Step by Step Solution

1. Step 1: Write the proportion equation
   142,323 : 309,702 = 309,702 : x
2. Step 2: Convert to fraction form
   142,323/309,702 = 309,702/x
3. Step 3: Cross multiply
   142,323x = 309,702 × 309,702
4. Step 4: Simplify right side
   142,323x = 95,915,328,804
5. Step 5: Solve for x
   x = 95,915,328,804/142,323
6. Step 6: Final answer
   x = 673,927.12