Finding the Third Proportional to 89,990 and 196,930

Step by Step Solution

1. Step 1: Write the proportion equation
   89,990 : 196,930 = 196,930 : x
2. Step 2: Convert to fraction form
   89,990/196,930 = 196,930/x
3. Step 3: Cross multiply
   89,990x = 196,930 × 196,930
4. Step 4: Simplify right side
   89,990x = 38,781,424,900
5. Step 5: Solve for x
   x = 38,781,424,900/89,990
6. Step 6: Final answer
   x = 430,952.60