Finding the Third Proportional to 21,358.69 and 31,245.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,358.69 : 31,245.75 = 31,245.75 : x
2. Step 2: Convert to fraction form
   21,358.69/31,245.75 = 31,245.75/x
3. Step 3: Cross multiply
   21,358.69x = 31,245.75 × 31,245.75
4. Step 4: Simplify right side
   21,358.69x = 976,296,893.06
5. Step 5: Solve for x
   x = 976,296,893.06/21,358.69
6. Step 6: Final answer
   x = 45,709.59