Finding the Third Proportional to 142,335 and 309,726

Step by Step Solution

1. Step 1: Write the proportion equation
   142,335 : 309,726 = 309,726 : x
2. Step 2: Convert to fraction form
   142,335/309,726 = 309,726/x
3. Step 3: Cross multiply
   142,335x = 309,726 × 309,726
4. Step 4: Simplify right side
   142,335x = 95,930,195,076
5. Step 5: Solve for x
   x = 95,930,195,076/142,335
6. Step 6: Final answer
   x = 673,974.74