Finding the Third Proportional to 68,311.50 and 140,025

Step by Step Solution

1. Step 1: Write the proportion equation
   68,311.50 : 140,025 = 140,025 : x
2. Step 2: Convert to fraction form
   68,311.50/140,025 = 140,025/x
3. Step 3: Cross multiply
   68,311.50x = 140,025 × 140,025
4. Step 4: Simplify right side
   68,311.50x = 19,607,000,625
5. Step 5: Solve for x
   x = 19,607,000,625/68,311.50
6. Step 6: Final answer
   x = 287,023.42