Finding the Third Proportional to 20,355 and 31,905

Step by Step Solution

1. Step 1: Write the proportion equation
   20,355 : 31,905 = 31,905 : x
2. Step 2: Convert to fraction form
   20,355/31,905 = 31,905/x
3. Step 3: Cross multiply
   20,355x = 31,905 × 31,905
4. Step 4: Simplify right side
   20,355x = 1,017,929,025
5. Step 5: Solve for x
   x = 1,017,929,025/20,355
6. Step 6: Final answer
   x = 50,008.80