Finding the Third Proportional to 21,040 and 31,713

Step by Step Solution

1. Step 1: Write the proportion equation
   21,040 : 31,713 = 31,713 : x
2. Step 2: Convert to fraction form
   21,040/31,713 = 31,713/x
3. Step 3: Cross multiply
   21,040x = 31,713 × 31,713
4. Step 4: Simplify right side
   21,040x = 1,005,714,369
5. Step 5: Solve for x
   x = 1,005,714,369/21,040
6. Step 6: Final answer
   x = 47,800.11