Finding the Third Proportional to 40,093 and 86,990

Step by Step Solution

1. Step 1: Write the proportion equation
   40,093 : 86,990 = 86,990 : x
2. Step 2: Convert to fraction form
   40,093/86,990 = 86,990/x
3. Step 3: Cross multiply
   40,093x = 86,990 × 86,990
4. Step 4: Simplify right side
   40,093x = 7,567,260,100
5. Step 5: Solve for x
   x = 7,567,260,100/40,093
6. Step 6: Final answer
   x = 188,742.68