Finding the Third Proportional to 5,057.53 and 10,315.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,057.53 : 10,315.78 = 10,315.78 : x
2. Step 2: Convert to fraction form
   5,057.53/10,315.78 = 10,315.78/x
3. Step 3: Cross multiply
   5,057.53x = 10,315.78 × 10,315.78
4. Step 4: Simplify right side
   5,057.53x = 106,415,342.80
5. Step 5: Solve for x
   x = 106,415,342.80/5,057.53
6. Step 6: Final answer
   x = 21,040.97