Finding the Third Proportional to 13,065.28 and 19,720.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,065.28 : 19,720.36 = 19,720.36 : x
2. Step 2: Convert to fraction form
   13,065.28/19,720.36 = 19,720.36/x
3. Step 3: Cross multiply
   13,065.28x = 19,720.36 × 19,720.36
4. Step 4: Simplify right side
   13,065.28x = 388,892,573.88
5. Step 5: Solve for x
   x = 388,892,573.88/13,065.28
6. Step 6: Final answer
   x = 29,765.34