Finding the Third Proportional to 13,007.25 and 20,131.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,007.25 : 20,131.88 = 20,131.88 : x
2. Step 2: Convert to fraction form
   13,007.25/20,131.88 = 20,131.88/x
3. Step 3: Cross multiply
   13,007.25x = 20,131.88 × 20,131.88
4. Step 4: Simplify right side
   13,007.25x = 405,292,391.02
5. Step 5: Solve for x
   x = 405,292,391.02/13,007.25
6. Step 6: Final answer
   x = 31,158.96