Finding the Third Proportional to 3,855.25 and 8,404.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,855.25 : 8,404.25 = 8,404.25 : x
2. Step 2: Convert to fraction form
   3,855.25/8,404.25 = 8,404.25/x
3. Step 3: Cross multiply
   3,855.25x = 8,404.25 × 8,404.25
4. Step 4: Simplify right side
   3,855.25x = 70,631,418.06
5. Step 5: Solve for x
   x = 70,631,418.06/3,855.25
6. Step 6: Final answer
   x = 18,320.84