Finding the Third Proportional to 147,395 and 315,819

Step by Step Solution

1. Step 1: Write the proportion equation
   147,395 : 315,819 = 315,819 : x
2. Step 2: Convert to fraction form
   147,395/315,819 = 315,819/x
3. Step 3: Cross multiply
   147,395x = 315,819 × 315,819
4. Step 4: Simplify right side
   147,395x = 99,741,640,761
5. Step 5: Solve for x
   x = 99,741,640,761/147,395
6. Step 6: Final answer
   x = 676,696.23