Finding the Third Proportional to 41,980 and 64,990

Step by Step Solution

1. Step 1: Write the proportion equation
   41,980 : 64,990 = 64,990 : x
2. Step 2: Convert to fraction form
   41,980/64,990 = 64,990/x
3. Step 3: Cross multiply
   41,980x = 64,990 × 64,990
4. Step 4: Simplify right side
   41,980x = 4,223,700,100
5. Step 5: Solve for x
   x = 4,223,700,100/41,980
6. Step 6: Final answer
   x = 100,612.20