Finding the Third Proportional to 9,421.88 and 13,871.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,421.88 : 13,871.25 = 13,871.25 : x
2. Step 2: Convert to fraction form
   9,421.88/13,871.25 = 13,871.25/x
3. Step 3: Cross multiply
   9,421.88x = 13,871.25 × 13,871.25
4. Step 4: Simplify right side
   9,421.88x = 192,411,576.56
5. Step 5: Solve for x
   x = 192,411,576.56/9,421.88
6. Step 6: Final answer
   x = 20,421.79