Finding the Third Proportional to 147,172.50 and 317,871

Step by Step Solution

1. Step 1: Write the proportion equation
   147,172.50 : 317,871 = 317,871 : x
2. Step 2: Convert to fraction form
   147,172.50/317,871 = 317,871/x
3. Step 3: Cross multiply
   147,172.50x = 317,871 × 317,871
4. Step 4: Simplify right side
   147,172.50x = 101,041,972,641
5. Step 5: Solve for x
   x = 101,041,972,641/147,172.50
6. Step 6: Final answer
   x = 686,554.71