Finding the Third Proportional to 13,972.50 and 20,768.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,972.50 : 20,768.91 = 20,768.91 : x
2. Step 2: Convert to fraction form
   13,972.50/20,768.91 = 20,768.91/x
3. Step 3: Cross multiply
   13,972.50x = 20,768.91 × 20,768.91
4. Step 4: Simplify right side
   13,972.50x = 431,347,466.82
5. Step 5: Solve for x
   x = 431,347,466.82/13,972.50
6. Step 6: Final answer
   x = 30,871.17