Finding the Third Proportional to 13,131.56 and 19,969.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.56 : 19,969.88 = 19,969.88 : x
2. Step 2: Convert to fraction form
   13,131.56/19,969.88 = 19,969.88/x
3. Step 3: Cross multiply
   13,131.56x = 19,969.88 × 19,969.88
4. Step 4: Simplify right side
   13,131.56x = 398,795,907.52
5. Step 5: Solve for x
   x = 398,795,907.52/13,131.56
6. Step 6: Final answer
   x = 30,369.27