Finding the Third Proportional to 66,172 and 144,008

Step by Step Solution

1. Step 1: Write the proportion equation
   66,172 : 144,008 = 144,008 : x
2. Step 2: Convert to fraction form
   66,172/144,008 = 144,008/x
3. Step 3: Cross multiply
   66,172x = 144,008 × 144,008
4. Step 4: Simplify right side
   66,172x = 20,738,304,064
5. Step 5: Solve for x
   x = 20,738,304,064/66,172
6. Step 6: Final answer
   x = 313,399.99