Finding the Third Proportional to 19,815 and 31,860

Step by Step Solution

1. Step 1: Write the proportion equation
   19,815 : 31,860 = 31,860 : x
2. Step 2: Convert to fraction form
   19,815/31,860 = 31,860/x
3. Step 3: Cross multiply
   19,815x = 31,860 × 31,860
4. Step 4: Simplify right side
   19,815x = 1,015,059,600
5. Step 5: Solve for x
   x = 1,015,059,600/19,815
6. Step 6: Final answer
   x = 51,226.83