Finding the Third Proportional to 89,987 and 196,921

Step by Step Solution

1. Step 1: Write the proportion equation
   89,987 : 196,921 = 196,921 : x
2. Step 2: Convert to fraction form
   89,987/196,921 = 196,921/x
3. Step 3: Cross multiply
   89,987x = 196,921 × 196,921
4. Step 4: Simplify right side
   89,987x = 38,777,880,241
5. Step 5: Solve for x
   x = 38,777,880,241/89,987
6. Step 6: Final answer
   x = 430,927.58