Finding the Third Proportional to 68,940 and 142,200

Step by Step Solution

1. Step 1: Write the proportion equation
   68,940 : 142,200 = 142,200 : x
2. Step 2: Convert to fraction form
   68,940/142,200 = 142,200/x
3. Step 3: Cross multiply
   68,940x = 142,200 × 142,200
4. Step 4: Simplify right side
   68,940x = 20,220,840,000
5. Step 5: Solve for x
   x = 20,220,840,000/68,940
6. Step 6: Final answer
   x = 293,310.70