Finding the Third Proportional to 40,891 and 59,990

Step by Step Solution

1. Step 1: Write the proportion equation
   40,891 : 59,990 = 59,990 : x
2. Step 2: Convert to fraction form
   40,891/59,990 = 59,990/x
3. Step 3: Cross multiply
   40,891x = 59,990 × 59,990
4. Step 4: Simplify right side
   40,891x = 3,598,800,100
5. Step 5: Solve for x
   x = 3,598,800,100/40,891
6. Step 6: Final answer
   x = 88,009.59