Finding the Third Proportional to 3,851.72 and 7,209.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.72 : 7,209.84 = 7,209.84 : x
2. Step 2: Convert to fraction form
   3,851.72/7,209.84 = 7,209.84/x
3. Step 3: Cross multiply
   3,851.72x = 7,209.84 × 7,209.84
4. Step 4: Simplify right side
   3,851.72x = 51,981,846.90
5. Step 5: Solve for x
   x = 51,981,846.90/3,851.72
6. Step 6: Final answer
   x = 13,495.75