Finding the Third Proportional to 67,200 and 144,810

Step by Step Solution

1. Step 1: Write the proportion equation
   67,200 : 144,810 = 144,810 : x
2. Step 2: Convert to fraction form
   67,200/144,810 = 144,810/x
3. Step 3: Cross multiply
   67,200x = 144,810 × 144,810
4. Step 4: Simplify right side
   67,200x = 20,969,936,100
5. Step 5: Solve for x
   x = 20,969,936,100/67,200
6. Step 6: Final answer
   x = 312,052.62