Finding the Third Proportional to 143,398 and 315,022

Step by Step Solution

1. Step 1: Write the proportion equation
   143,398 : 315,022 = 315,022 : x
2. Step 2: Convert to fraction form
   143,398/315,022 = 315,022/x
3. Step 3: Cross multiply
   143,398x = 315,022 × 315,022
4. Step 4: Simplify right side
   143,398x = 99,238,860,484
5. Step 5: Solve for x
   x = 99,238,860,484/143,398
6. Step 6: Final answer
   x = 692,051.91