Finding the Third Proportional to 143,264 and 315,160

Step by Step Solution

1. Step 1: Write the proportion equation
   143,264 : 315,160 = 315,160 : x
2. Step 2: Convert to fraction form
   143,264/315,160 = 315,160/x
3. Step 3: Cross multiply
   143,264x = 315,160 × 315,160
4. Step 4: Simplify right side
   143,264x = 99,325,825,600
5. Step 5: Solve for x
   x = 99,325,825,600/143,264
6. Step 6: Final answer
   x = 693,306.24