Finding the Third Proportional to 21,354.75 and 31,911.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,354.75 : 31,911.75 = 31,911.75 : x
2. Step 2: Convert to fraction form
   21,354.75/31,911.75 = 31,911.75/x
3. Step 3: Cross multiply
   21,354.75x = 31,911.75 × 31,911.75
4. Step 4: Simplify right side
   21,354.75x = 1,018,359,788.06
5. Step 5: Solve for x
   x = 1,018,359,788.06/21,354.75
6. Step 6: Final answer
   x = 47,687.74