Finding the Third Proportional to 5,455.69 and 8,346.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,455.69 : 8,346.38 = 8,346.38 : x
2. Step 2: Convert to fraction form
   5,455.69/8,346.38 = 8,346.38/x
3. Step 3: Cross multiply
   5,455.69x = 8,346.38 × 8,346.38
4. Step 4: Simplify right side
   5,455.69x = 69,661,975.64
5. Step 5: Solve for x
   x = 69,661,975.64/5,455.69
6. Step 6: Final answer
   x = 12,768.69