Finding the Third Proportional to 89,086 and 136,990

Step by Step Solution

1. Step 1: Write the proportion equation
   89,086 : 136,990 = 136,990 : x
2. Step 2: Convert to fraction form
   89,086/136,990 = 136,990/x
3. Step 3: Cross multiply
   89,086x = 136,990 × 136,990
4. Step 4: Simplify right side
   89,086x = 18,766,260,100
5. Step 5: Solve for x
   x = 18,766,260,100/89,086
6. Step 6: Final answer
   x = 210,653.30