Finding the Third Proportional to 65,171.75 and 142,800

Step by Step Solution

1. Step 1: Write the proportion equation
   65,171.75 : 142,800 = 142,800 : x
2. Step 2: Convert to fraction form
   65,171.75/142,800 = 142,800/x
3. Step 3: Cross multiply
   65,171.75x = 142,800 × 142,800
4. Step 4: Simplify right side
   65,171.75x = 20,391,840,000
5. Step 5: Solve for x
   x = 20,391,840,000/65,171.75
6. Step 6: Final answer
   x = 312,893.85