Finding the Third Proportional to 20,578 and 31,018

Step by Step Solution

1. Step 1: Write the proportion equation
   20,578 : 31,018 = 31,018 : x
2. Step 2: Convert to fraction form
   20,578/31,018 = 31,018/x
3. Step 3: Cross multiply
   20,578x = 31,018 × 31,018
4. Step 4: Simplify right side
   20,578x = 962,116,324
5. Step 5: Solve for x
   x = 962,116,324/20,578
6. Step 6: Final answer
   x = 46,754.61