Finding the Third Proportional to 13,131.75 and 19,940.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.75 : 19,940.63 = 19,940.63 : x
2. Step 2: Convert to fraction form
   13,131.75/19,940.63 = 19,940.63/x
3. Step 3: Cross multiply
   13,131.75x = 19,940.63 × 19,940.63
4. Step 4: Simplify right side
   13,131.75x = 397,628,525.39
5. Step 5: Solve for x
   x = 397,628,525.39/13,131.75
6. Step 6: Final answer
   x = 30,279.93