Finding the Third Proportional to 21,424.50 and 31,299.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,424.50 : 31,299.75 = 31,299.75 : x
2. Step 2: Convert to fraction form
   21,424.50/31,299.75 = 31,299.75/x
3. Step 3: Cross multiply
   21,424.50x = 31,299.75 × 31,299.75
4. Step 4: Simplify right side
   21,424.50x = 979,674,350.06
5. Step 5: Solve for x
   x = 979,674,350.06/21,424.50
6. Step 6: Final answer
   x = 45,726.82