Finding the Third Proportional to 90,668 and 140,738

Step by Step Solution

1. Step 1: Write the proportion equation
   90,668 : 140,738 = 140,738 : x
2. Step 2: Convert to fraction form
   90,668/140,738 = 140,738/x
3. Step 3: Cross multiply
   90,668x = 140,738 × 140,738
4. Step 4: Simplify right side
   90,668x = 19,807,184,644
5. Step 5: Solve for x
   x = 19,807,184,644/90,668
6. Step 6: Final answer
   x = 218,458.38