Finding the Third Proportional to 4,387.69 and 9,519.56

Step by Step Solution

1. Step 1: Write the proportion equation
   4,387.69 : 9,519.56 = 9,519.56 : x
2. Step 2: Convert to fraction form
   4,387.69/9,519.56 = 9,519.56/x
3. Step 3: Cross multiply
   4,387.69x = 9,519.56 × 9,519.56
4. Step 4: Simplify right side
   4,387.69x = 90,622,070.19
5. Step 5: Solve for x
   x = 90,622,070.19/4,387.69
6. Step 6: Final answer
   x = 20,653.72