Finding the Third Proportional to 67,269.75 and 142,738.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,269.75 : 142,738.50 = 142,738.50 : x
2. Step 2: Convert to fraction form
   67,269.75/142,738.50 = 142,738.50/x
3. Step 3: Cross multiply
   67,269.75x = 142,738.50 × 142,738.50
4. Step 4: Simplify right side
   67,269.75x = 20,374,279,382.25
5. Step 5: Solve for x
   x = 20,374,279,382.25/67,269.75
6. Step 6: Final answer
   x = 302,874.31