Finding the Third Proportional to 68,808 and 140,530

Step by Step Solution

1. Step 1: Write the proportion equation
   68,808 : 140,530 = 140,530 : x
2. Step 2: Convert to fraction form
   68,808/140,530 = 140,530/x
3. Step 3: Cross multiply
   68,808x = 140,530 × 140,530
4. Step 4: Simplify right side
   68,808x = 19,748,680,900
5. Step 5: Solve for x
   x = 19,748,680,900/68,808
6. Step 6: Final answer
   x = 287,011.41