Finding the Third Proportional to 13,655.25 and 17,259.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,655.25 : 17,259.75 = 17,259.75 : x
2. Step 2: Convert to fraction form
   13,655.25/17,259.75 = 17,259.75/x
3. Step 3: Cross multiply
   13,655.25x = 17,259.75 × 17,259.75
4. Step 4: Simplify right side
   13,655.25x = 297,898,970.06
5. Step 5: Solve for x
   x = 297,898,970.06/13,655.25
6. Step 6: Final answer
   x = 21,815.71