Finding the Third Proportional to 12,339.75 and 19,871.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339.75 : 19,871.25 = 19,871.25 : x
2. Step 2: Convert to fraction form
   12,339.75/19,871.25 = 19,871.25/x
3. Step 3: Cross multiply
   12,339.75x = 19,871.25 × 19,871.25
4. Step 4: Simplify right side
   12,339.75x = 394,866,576.56
5. Step 5: Solve for x
   x = 394,866,576.56/12,339.75
6. Step 6: Final answer
   x = 31,999.56