Finding the Third Proportional to 13,057.31 and 19,891.97

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.31 : 19,891.97 = 19,891.97 : x
2. Step 2: Convert to fraction form
   13,057.31/19,891.97 = 19,891.97/x
3. Step 3: Cross multiply
   13,057.31x = 19,891.97 × 19,891.97
4. Step 4: Simplify right side
   13,057.31x = 395,690,420.75
5. Step 5: Solve for x
   x = 395,690,420.75/13,057.31
6. Step 6: Final answer
   x = 30,304.12