Finding the Third Proportional to 89,690 and 196,873

Step by Step Solution

1. Step 1: Write the proportion equation
   89,690 : 196,873 = 196,873 : x
2. Step 2: Convert to fraction form
   89,690/196,873 = 196,873/x
3. Step 3: Cross multiply
   89,690x = 196,873 × 196,873
4. Step 4: Simplify right side
   89,690x = 38,758,978,129
5. Step 5: Solve for x
   x = 38,758,978,129/89,690
6. Step 6: Final answer
   x = 432,143.81