Finding the Third Proportional to 3,454.69 and 5,404.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,454.69 : 5,404.31 = 5,404.31 : x
2. Step 2: Convert to fraction form
   3,454.69/5,404.31 = 5,404.31/x
3. Step 3: Cross multiply
   3,454.69x = 5,404.31 × 5,404.31
4. Step 4: Simplify right side
   3,454.69x = 29,206,593.60
5. Step 5: Solve for x
   x = 29,206,593.60/3,454.69
6. Step 6: Final answer
   x = 8,454.19