Finding the Third Proportional to 5,406.75 and 12,404.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,406.75 : 12,404.39 = 12,404.39 : x
2. Step 2: Convert to fraction form
   5,406.75/12,404.39 = 12,404.39/x
3. Step 3: Cross multiply
   5,406.75x = 12,404.39 × 12,404.39
4. Step 4: Simplify right side
   5,406.75x = 153,868,906.78
5. Step 5: Solve for x
   x = 153,868,906.78/5,406.75
6. Step 6: Final answer
   x = 28,458.67