Finding the Third Proportional to 13,699.13 and 17,275.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,699.13 : 17,275.78 = 17,275.78 : x
2. Step 2: Convert to fraction form
   13,699.13/17,275.78 = 17,275.78/x
3. Step 3: Cross multiply
   13,699.13x = 17,275.78 × 17,275.78
4. Step 4: Simplify right side
   13,699.13x = 298,452,617.80
5. Step 5: Solve for x
   x = 298,452,617.80/13,699.13
6. Step 6: Final answer
   x = 21,786.25