Finding the Third Proportional to 17,389.69 and 26,509.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,389.69 : 26,509.78 = 26,509.78 : x
2. Step 2: Convert to fraction form
   17,389.69/26,509.78 = 26,509.78/x
3. Step 3: Cross multiply
   17,389.69x = 26,509.78 × 26,509.78
4. Step 4: Simplify right side
   17,389.69x = 702,768,501.92
5. Step 5: Solve for x
   x = 702,768,501.92/17,389.69
6. Step 6: Final answer
   x = 40,412.95