Finding the Third Proportional to 201,663 and 318,870

Step by Step Solution

1. Step 1: Write the proportion equation
   201,663 : 318,870 = 318,870 : x
2. Step 2: Convert to fraction form
   201,663/318,870 = 318,870/x
3. Step 3: Cross multiply
   201,663x = 318,870 × 318,870
4. Step 4: Simplify right side
   201,663x = 101,678,076,900
5. Step 5: Solve for x
   x = 101,678,076,900/201,663
6. Step 6: Final answer
   x = 504,197.98