Finding the Third Proportional to 13,661.25 and 20,888.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,661.25 : 20,888.63 = 20,888.63 : x
2. Step 2: Convert to fraction form
   13,661.25/20,888.63 = 20,888.63/x
3. Step 3: Cross multiply
   13,661.25x = 20,888.63 × 20,888.63
4. Step 4: Simplify right side
   13,661.25x = 436,334,654.39
5. Step 5: Solve for x
   x = 436,334,654.39/13,661.25
6. Step 6: Final answer
   x = 31,939.58