Finding the Third Proportional to 3,851.25 and 7,209.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.25 : 7,209.75 = 7,209.75 : x
2. Step 2: Convert to fraction form
   3,851.25/7,209.75 = 7,209.75/x
3. Step 3: Cross multiply
   3,851.25x = 7,209.75 × 7,209.75
4. Step 4: Simplify right side
   3,851.25x = 51,980,495.06
5. Step 5: Solve for x
   x = 51,980,495.06/3,851.25
6. Step 6: Final answer
   x = 13,497.05